Sunday, March 30, 2008

Cave rescue

Cave rescue

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Chattanooga/Hamilton County Cave Rescue Team transporting an injured caver with a dislocated ankle
Chattanooga/Hamilton County Cave Rescue Team transporting an injured caver with a dislocated ankle

Cave rescue is a highly specialized field of wilderness rescue in which injured, trapped or lost cave explorers are medically treated and extracted from various cave environments.

Cave rescue borrows from elements from firefighting, confined space rescue, rope rescue and mountaineering techniques but has also developed its own special techniques and skills for performing work in conditions that are almost always difficult and demanding. Since cave accidents, on an absolute scale, are a very limited form of incident, and cave rescue is a very specialized skill, normal emergency staff are rarely employed in the underground elements of the rescue. Instead, this is usually undertaken by other experienced cavers who undergo regular training through their organizations and are called up at need.

Cave rescues are slow, deliberate operations that require both a high level of organized teamwork and good communications. The extremes of the cave environment (air temperature, water, vertical depth) dictate every aspect of a cave rescue. Therefore the rescuers must adapt skills and techniques that are as dynamic as the environment they must operate in.

Overview

Organized Cave Rescue Units in the United States are generally city/county funded volunteer squads, comprised mainly of seasoned, local cavers. The typical Southeastern U.S. cave rescue team averages between 15 and 20 active members. Due to the excessive amount of manpower required on a large scale cave rescue, it is not uncommon for multiple cave rescue units from various regions to assist another in extensive underground operations. Because organized cave rescue teams are quite rare, it is also quite common for local units to cover regions that extend far beyond their agencies jurisdiction. The number of cave rescues in North America are relatively small compared to other common wilderness rescues. The average number of reported cave related incidents is usually 40 to 50 per year. In most years approximately 10 percent of reported accidents result in death.[1]

In the United States, the leading cave rescue training curriculum is developed and deployed by the National Cave Rescue Commission[2] (NCRC), which operates as part of the National Speleological Society (NSS). The NCRC is not an operational cave rescue unit, but the organization is comprised of members of regional rescue squads.[3]

Outside of the US exists a network of international cave rescue units under the banner of the Union Internationale de Spéléologie (UIS) - Cave Rescue Commission. Most international cave rescue units such as the New South Wales Cave Rescue Squad based in Sydney, Australia are listed with contacts in the event of a cave incident.

Historic examples

  • Marcel Loubens from Pierre St - Martin Cave in the French Pyrenees in 1952. Loubens died from a fatal plunge down the 1,135 foot entrance shaft after a clasp on his harness broke on ascent. Members of Loubens' expedition spent over 24 hours attempting unsuccessfully to haul their friend back to the surface. Despite the efforts of the team doctor, Loubens died 36 hours into his ill-fated rescue attempt. After his passing the remaining members aborted their recovery attempt. Louben's body remained in the cave for two more years before cavers returned him to the surface in 1954. The blood transfusion given to Loubens by the team doctor was likely the first subterranean care of its kind.[4]
  • James G. Mitchell from Schroeder's Pants Cave in Manheim, New York in 1965. James Mitchell was a 23-year-old chemist whose death made national headlines in February 1965 when he died of exposure after becoming stranded on rope in a 75 foot pit with a frigid waterfall. Initial efforts to recover Mitchell's body failed. A rescue team was flown from Washington D.C. on Air Force 2. A subsequent three day effort to retrieve Mitchell was aborted after repeated failures and a collapse. The cave was abandoned and blasted shut, essentially making the cave a tomb. Mitchell's death made headlines again forty-one years later when a group returned to the cave and successfully recovered his remains.[5]
  • Emily Davis Mobley from Lechuguilla Cave in New Mexico in 1991. More than seventy people worked over four days to bring her to the surface after her leg was broken. This was the deepest and most remote cave rescue in American history.
  • Floyd Collins from Sand Cave in Kentucky in 1925. Likely the first high profile cave rescue in history. Floyd Collins' desperate situation in the depths of Sand Cave made headlines across America. Over 10,000 spectators flocked to Sand Cave in the week following the news of Floyd's predicament. The National Guard was called in to control the carnival-like atmosphere surrounding the cave. Despite the heroic efforts of volunteers who attempted to dig a parallel shaft to free Collins, he was found dead, buried to his shoulders in debris. One 25 pound rock had lodged Collin's foot preventing his escape. Floyd Collins remained trapped in Sand Cave for another 2 months until a crew of German engineers finished the digging of the shaft and extracted his body.[6]
  • Neil Moss in Peak Cavern, England in 1959. Trapped in a narrow tunnel, he was eventually suffocated by carbon dioxide after prolonged efforts to free him. Rescuers were unable to free Moss and eventually the family asked that his body remain in the cave.
  • Gerald Moni from McBrides Cave in Alabama in 1997. Moni and his group entered McBrides Cave in flood stage attempting a pull-down trip to the cave's lower entrance. A flash flood caused the situation in the cave to become extremely hazardous. While attempting to negotiate a pit being inundated with a high flow of water, Gerald mistakenly grabbed only one of two ropes necessary to descend the pit. The resultant fall to a ledge part way down the drop resulted in a broken femur. A few members of the group managed to negotiate the lower stream passage before it sumped and reached the surface. The others remained with Moni until local rescue agencies could mobilize and attempt a rescue. Rescue teams spent hours waiting for the water levels in the cave to recede enough to attempt an extraction. When teams finally reached Moni, he had been exposed to frigid water for over 12 hours. Rescue teams risked drowning themselves and Moni while traversing the flooded lower cave. 18 hours after his fall Gerald was returned to the surface alive.[7]

In the United States

Organized Cave Rescue Teams generally utilize the Incident Command System. Originally devised for wildland fire teams, today the ICS is used by a variety of agencies throughout North America. The ICS can be modified by each agency depending on the nature of their emergencies. Below is an example of a typical cave rescue Incident Command System.[8]

Members of the Chattanooga/Hamilton County Cave Team haul a patient from the 50 foot deep entrance pit of Pryor Springs Cave using a guiding line
Members of the Chattanooga/Hamilton County Cave Team haul a patient from the 50 foot deep entrance pit of Pryor Springs Cave using a guiding line
  • Incident Commander - is responsible for all activities, including the development and implementation of strategic decisions during the course of an incident. The IC monitors all aspects of an operation including planning, logistics, communications and information.
  • Underground Manager - is usually responsible for the implementation the plan provided by the incident commander. The underground manager assigns and monitors vital tasks including rigging, medical, patient packaging and transport, and communications with the IC on the surface. The underground manager is also usually responsible for the safety of the entire underground team.
  • Initial Response Team - is a small unit of 1st responders. The task of the IRT team is to travel through the cave to the patient and evaluate the situation with the purpose of reporting back to the appropriate manager. The IRT team usually includes the medical personnel so medical intervention can begin early if necessary.
  • Medical Team - varies in size and level of the medics ability from agency to agency. The medical team rarely participates in any other rescue function other than managing patient care.
  • Communications Team - are responsible for creating and maintaining communications between the teams in the cave and the Incident Commander. A common means of communications on a cave rescue are military field phones. Military phones are reliable but heavy, and the need for abundant amounts of com-line can make running communications deep into a cave difficult. Another, more advanced type of communication, are low frequency radios, which eliminate the need for thousands of feet of com line in a cave. Low frequency radios can communicate through thousands of feet of solid rock, making them ideal for use deep into caves.
  • Rigging Team - are responsible for one or more stations in a cave that require the rigging of ropes or systems to safely transport the patient and emergency personnel through the cave. In a large scale rescue, many rigging teams could be scattered throughout a cave, assigned with multiple tasks.
  • Litter Team - is made up of rescue personnel that are not already assigned to rigging, communications, medical or management positions. The responsibility of the Litter Team is the packaging and safe transport of the patient through the cave.
  • Entrance Control - is responsible for the logging of all personnel entering and leaving a cave. In some cases the Entrance Control could also be assigned the duty of logging all gear entering and leaving the cave. This is an important task on any cave rescue.

Organisations

Australia

United Kingdom & Éire

United States

Other countries

Caving

Caving

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Caving frequently involves a lot of mud.
Caving frequently involves a lot of mud.

Caving, also called spelunking, is the recreational sport of exploring caves. In contrast, speleology is the scientific study of caves and the cave environment.[1]


Overview

The challenges of the sport depend on the cave being visited, but often include the negotiation of pitches, squeezes, and watercave diving is a separate sub-specialty undertaken only by very few cavers). Climbing or crawling is often necessary, and ropes are used extensively for safety of the negotiation of particularly steep or slippery passages. (though actual

Caving is often undertaken for the enjoyment of the activity or for physical exercise, as well as original exploration, similar to mountaineering or diving. Physical or biological science is also an important goal for some cavers. Virgin cave systems comprise some of the last unexplored regions on Earth and much effort is put into trying to locate and enter them. In well-explored regions (such as most first-world countries), the most accessible caves have already been explored, and gaining access to new caves often requires digging or diving.

Caves have been explored out of necessity (for shelter from the elements or from enemies), out of curiosity or for mystical reasons for thousands of years. However, only in the last century or two has the activity developed into a sophisticated, athletic pastime. In recent decades caving has changed considerably due to the availability of modern protective wear and equipment. It has recently come to be known as an "extreme sport" by some (though not commonly considered as such by its practitioners, who may dislike the term for its perceived connotation of disregard for safety).

Many of the skills of caving can also be used in the nature activities of mine exploration and urban exploration.

Naming issues

Clay Perry — an American caver of the 1940s — wrote about a group of men and boys who explored and studied caves throughout New England. This group referred to themselves as spelunkers. This is regarded as the first use of the word in the Americas. Throughout the 1950s, spelunking was the general term used for exploring caves in US English. It was used freely, without any positive or negative connotations, although only rarely outside the US.

In the 1960s, the term "spelunking" began to convey the idea of inexperienced cavers, using unreliable light sources and cotton clothing. In 1985, Steve Knutson (editor of American Caving Accidents) made the following distinction:

"...Note that I use the term 'spelunker' to denote someone untrained and unknowledgeable in current exploration techniques, and 'caver' for those who are."

This sentiment is exemplified by bumper stickers and t-shirts displayed by many cavers: "Cavers rescue spelunkers".

Potholing refers to the act of exploring potholes, a word originating in the north of England for predominantly vertical caves. The term is often used as a synonym for caving, and outside the caving world there is a general impression that potholing is a more "extreme" version of caving.[citation needed]

Practice and equipment

Caver in an Alabama cave showing common caving wear: overalls and helmet-mounted lights.
Caver in an Alabama cave showing common caving wear: overalls and helmet-mounted lights.

Helmets are worn to protect the head from bumps and falling rocks. The caver's primary light source is usually mounted on the helmet in order to keep the hands free. Electric lights are most common, with halogen lamps being standard and white LEDs as the new competing technology. Many cavers carry two or more sources of light - one as primary and the others as backup in case the first fails. More often than not, a second light will be mounted to the helmet for quick transition if the primary fails. Carbide lamps systems are an older form of illumination, inspired by miner's equipment, and are still used by some cavers.[2]

The type of clothes worn underground varies according to the environment of the cave being explored, and the local culture. In cold caves, the caver may wear a warm base layer that retains its insulating properties when wet, such as a fleece ("furry") suit and/or polypropylene underwear, and an oversuit of hard-wearing (e.g., cordura) and/or waterproof (e.g., PVC) material. Lighter clothing may be worn in warm caves, particularly if the cave is dry, and in tropical caves thin polypropylene clothing is used, to provide some abrasion protection whilst remaining as cool as possible. Wetsuits may be worn if the cave is particularly wet or involves stream passages. On the feet boots are worn - hiking-style boots in drier caves, or rubber boots (such as wellies) often with neoprene socks ("wetsocks") in wetter caves. Knee-pads (and sometimes elbow-pads) are popular for protecting joints during crawls. Depending on the nature of the cave, gloves are sometimes worn to protect the hands against abrasion and/or cold. In pristine areas and for restoration, clean oversuits and powder-free, non-latex surgical gloves are used to protect the cave itself from contaminants.

Ropes are used for descending or ascending pitches ("Single Rope Technique") or for protection. Knots commonly used in caving are the figure-of-eight- (or figure-of-nine-) loop, bowline, alpine butterfly, and Italian hitch. Ropes are usually rigged using bolts, slings, and karabiners. In some cases cavers may choose to bring and use a flexible metal ladder.

In addition to the equipment already described, cavers frequently carry packs containing first-aid kits, emergency equipment, and food. Containers for securely transporting urine are also commonly carried. On longer trips, containers for securely transporting faeces out of the cave are carried.

During very long trips, it may be necessary to camp in the cave. This necessitates the caver carrying sleeping and cooking equipment.

Safety

A caver begins rope descent of a vertical shaft using an abseil rack.
A caver begins rope descent of a vertical shaft using an abseil rack.
Main article: Cave rescue

Caves can be dangerous places; hypothermia, falling, flooding, and physical exhaustion are the main risks. Rescuing people from underground is difficult and time-consuming, and requires special skills, training, and equipment. Full-scale cave rescues often involve the efforts of dozens of rescue workers (often other long-time cavers who have participated in specialised courses, as normal rescue staff are not sufficiently experienced in cave environments), who may themselves be put in jeopardy in effecting the rescue. This said, caving is not necessarily a high-risk sport (especially if it does not involve difficult climbs or diving). As in all physical sports, knowing one's limitations is key.

The risks are minimised by a number of techniques:

  • Checking that there is no danger of flooding during the expedition. Rainwater funneled underground can flood a cave very quickly, trapping people in cut-off passages and drowning them. After falling, this is the most likely fatal accident in caving.[citation needed]
  • Using teams of several, preferably at least of four cavers. If an injury occurs, one caver stays with the injured person while the other two go out for help, providing assistance to each other on their way out.
  • Notifying people outside the cave as to the intended return time. After an appropriate delay without a return, these will then organise a search party (usually made up by other cavers trained in cave rescues, as even professional emergency personnel are unlikely to have the skills to effect a rescue in difficult conditions).
  • Use of helmet-mounted lights (hands-free) with extra batteries. American cavers recommend a minimum of three independent sources of light per person, but two lights is common practice amongst European cavers.[citation needed]
  • Sturdy clothing and footwear, as well as a helmet, are necessary to reduce the impact of abrasions, falls, and falling objects. Synthetic fibers and woolens, which dry quickly, shed water, and are warm when wet, are vastly preferred to cotton materials, which retain water and increase the risk of hypothermia. It is also helpful to have several layers of clothing, which can be shed (and stored in the pack) or added as needed. In watery cave passages, polypropylene thermal underwear or wetsuits may be required to avoid hypothermia.
  • Cave passages look different from different directions. In long or complex caves, even experienced cavers can become lost. To reduce the risk of becoming lost, it is necessary to memorise the appearance of key navigational points in the cave as they are passed by the exploring party. Each member of a cave party shares responsibility for being able to remember the route out of the cave. In some caves it may be acceptable to mark a small number of key junctions with small stacks or "cairns" of rocks, or to leave a non-permanent mark such as high-visibility flagging tape tied to a projection.
  • Vertical caving using ladders or SRT (Single Rope Technique) to avoid the need for climbing passages that are too difficult. SRT however is a complex skill and requires proper training before use underground and needs well-maintained equipment. Some drops that are abseiled down may be as deep as several hundred meters (for example Harwood Hole).

Cave conservation

A vertical cave in Alabama, USA
A vertical cave in Alabama, USA

Many cave environments are very fragile. Many speleothems can be damaged by even the slightest touch and some by impacts as slight as a breath.

Pollution is also of concern. Since water that flows through a cave eventually comes out in streams and rivers, any pollution may ultimately end up in someone's drinking water, and can even seriously affect the surface environment, as well. Even minor pollution such as dropping organic material can have a dramatic effect on the cave biota.

Cave-dwelling species are also very fragile, and often, a particular species found in a cave may live within that cave alone, and be found nowhere else in the world. Cave-dwelling species are accustomed to a near-constant climate of temperature and humidity, and any disturbance can be disruptive to the species' life cycles. Though cave wildlife may not always be immediately visible, it is typically nonetheless present in most caves.

Bats are one such fragile species of cave-dwelling animal. Despite their often frightening reputation in fiction and in the movies, bats generally have more to fear from humans than vice-versa. Bats can be beneficial to humans in many ways, especially through their important ecological role in reducing insect pest populations, and pollination of plant species. Bats which hibernate are most vulnerable during the winter season, when no food supply exists on the surface to replenish the bat's store of energy should it be awakened from hibernation. Bats which migrate are most sensitive during the summer months when they are raising their young. For these reasons, visiting caves inhabited by hibernating bats is discouraged during cold months; and visiting caves inhabited by migratory bats is discouraged during the warmer months when they are most sensitive and vulnerable.

Some cave passages may be marked with flagging tape or other indicators to show biologically, aesthetically, or archaeologically sensitive areas. Marked paths may show ways around notably fragile areas such as a pristine floor of sand or silt which may be thousands of years old, dating from the last time water flowed through the cave. Such deposits may easily be spoiled forever by a single misplaced step. Active formations such as flowstone can be similarly marred with a muddy footprint or handprint, and ancient human artifacts, such as fiber products, may even crumble to dust under the touch of any but the most careful archaeologist.

Caving organizations

Cavers in many countries have created organizations for the administration and oversight of caving activities within their nations. Among the oldest of these are the National Speleological Society (1941) of the USA (originally formed as the Speleological Society of the District of Columbia on May 6, 1939) and the Swiss Society of Speleology created in 1939 in Geneva, but the first speleological institute in the world was founded in 1920 in Cluj-Napoca, Romania, by Emil Racovita, a Romanian biologist, zoologist, speleologist and explorer of Antarctica. For a list of these organizations, see Caving organizations.


Rafting

Rafting

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Rafting in Brazil.
Rafting in Brazil.
River rafting in Ladakh, India.
River rafting in Ladakh, India.
Rafting on the Arkansas River.
Rafting on the Arkansas River.

Rafting or whitewater rafting is a recreational activity utilizing a raft to navigate a river or other bodies of water. This is usually done on whitewater or different degrees of rough water, in order to thrill and excite the raft passengers. The development of this activity as a leisure sport has become popular since the mid 1970s.

History

Rafting is one of the earliest means of transportation, used as a means for shipping people, hunting, and transferring food.

In 1842, Lieutenant John Fremont of the U.S. Army first journalized his rafting expedition on the Platte River. Horace H. Day designed the equipment he used in rafting. Day’s rafts were constructed from four independent rubber cloth tubes and wrap-around floor. [1]

In 1960s, rafting was then recognized and paths like Grand Canyon were routed and whitewater rafting companies were established.

In 1970s, rafting marked its major development as a leisure sport when it was then included in the Munich Olympic Games.

In 1980s, as rafting continued to gain its popularity, many rivers were opened for rafting activities including rivers in South America and Africa.

In 1990s, rafting was included in major game events like the Barcelona Games in 1992, Atlanta Games in 1996, and the whitewater events of the Summer Olympic Games hosted by Ocoee River in Tennessee Valley. In addition, the International Federation of Rafting was instituted in 1997 and in 1999 the first Official International Championship was held.

Currently, river rafting is still gaining popularity among extreme water sports in order to thrill and excite the raft passengers.[citation needed]

Whitewater rafts

Rafts were originally the simplest form of man’s transportation in water and were then made of several logs, planks or reeds which were fastened together. Nowadays, inflatable boat were used as rafts which were later adopted by the military for beach assaults. It consists of very durable, multi-layered rubberized or vinyl fabrics with several independent air chambers. Its length varies between 3.5 m (11 ft) and 6 m (20 ft), the width between 1.8 m (6 ft) and 2.5 m (8 ft). The exception to this size rule is usually the packraft, which is designed as a portable single-person raft and may be as small as 1.5m long and weigh as little as 4 lbs.

Rafts come in a few different forms. In Europe the most common is the symmetrical raft steered with a paddle at the stern. Other types are the asymmetrical, rudder-controlled raft and the symmetrical raft with central helm (oars). Rafts are usually propelled with ordinary paddles and typically hold 4 to 12 persons. In Russia rafts are often hand made and are often a catamaran style with two inflatable tubes attached to a frame. Pairs of paddlers navigate these rafts. Catamaran style rafts have become popular in the western United States as well, but are typically rowed instead of paddled.

Classes of Whitewater

Class 1: Very small rough areas, requires no maneuvering. (Skill Level: None)
Class 2: Some rough water, maybe some rocks, might require maneuvering.(Skill Level: Basic Paddling Skill)
Class 3: Whitewater, small waves, maybe a small drop, but no considerable danger. May require significant maneuvering.(Skill Level: Experienced paddling skills)
Class 4: Whitewater, medium waves, maybe rocks, maybe a considerable drop, sharp maneuvers may be needed. (Skill Level: Whitewater Experience)
Class 5: Whitewater, large waves, possibility of large rocks and hazards, possibility of a large drop, requires precise maneuvering (Skill Level: Advanced Whitewater Experience)
Class 6: Class 6 rapids are considered to be so dangerous as to be effectively unnavigable on a reliably safe basis. Rafters can expect to encounter substantial whitewater, huge waves, huge rocks and hazards, and/or substantial drops that will impart severe impacts beyond the structural capacities and impact ratings of most all rafting equipment. Traversing a Class 6 rapid has a dramatically increased likelihood of ending in serious injury or death compared to lesser classes. (Skill Level: Successful completion of a Class 6 rapid without serious injury or death is widely considered to be a matter of luck)

Safety

Whitewater rafting can be a dangerous sport, especially if basic safety precautions are not observed. Both commercial and private trips have seen their share of injuries and fatalities, though private travel has typically been associated with greater risk. Depending on the area, legislated safety measures may exist for rafting operators. These range from certification of outfitters, rafts, and raft leaders, to more stringent regulations about equipment and procedures. It is generally advisable to discuss safety measures with a rafting operator before signing on for a trip. The equipment used and the qualifications of the company and raft guides are essential information to be considered.

Like most outdoor sports, rafting in general has become safer over the years. Expertise in the sport has increased, and equipment has become more specialized and increased in quality. As a result the difficulty rating of most river runs has changed. A classic example would be the Colorado River in the Grand Canyon, which has swallowed whole expeditions in the past, leaving only fragments of boats but is now run safely by commercial outfitters hundreds of times each year, with relatively untrained passengers. [2]

Risks in whitewater rafting stem from both environmental dangers and from improper behavior. Certain features on rivers are inherently unsafe and have remained consistently so despite the passage of time. These would include "keeper hydraulics", "strainers" (e.g. fallen trees), dams (especially low-head dams, which tend to produce river-wide keeper hydraulics), undercut rocks, and of course dangerously high waterfalls. Rafting with experienced guides is the safest way to avoid such features. Even in safe areas, however, moving water can always present risks -- such as when a swimmer attempts to stand up on a rocky riverbed in strong current, risking foot entrapment. Irresponsible behavior related to rafting while intoxicated has also contributed to many accidents.

To combat the illusion that rafting is akin to an amusement park ride, and to underscore the personal responsibility each rafter faces on a trip, rafting outfitters generally require customers to sign waiver forms indicating understanding and acceptance of potential serious risks. Rafting trips often begin with safety presentations to educate customers about problems that may arise.

Due to this the overall risk level on a rafting trip with experienced guides using proper precautions is low.[citation needed] Thousands of people safely enjoy raft trips every year.

Issues with rafting

Rafting in Montenegro.
Rafting in Montenegro.

Like all wilderness sports, rafting has to balance the conflict between nature protection and nature use. Because of frequent problems in the past, some rivers now have regulations restricting or specifying the annual and daily operating times.

Conflicts have also arisen with environmentalists when rafting operators, often in co-operation with municipalities and tourism associations, alter the riverbed by dredging and/or blasting in order to eliminate safety risks or create more interesting whitewater features in the river. Incongruously these measures usually are only temporary, since a riverbed is subject to permanent changes.

On the other hand, rafting contributes to the economy of many alpine regions which in turn may contribute to the protection of rivers from hydroelectric power generation and other development. Additionally, white water rafting trips can promote environmentalism. By experiencing first hand the beauty of a given river, individuals who would otherwise be indifferent to the environmental concerns of an area may gain a strong desire to protect and preserve that area because of a positive outdoors experience.

Rope climbing

Rope climbing

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A competitor in a rope climbing event, at Lyon's Part-Dieu shopping centre.
A competitor in a rope climbing event, at Lyon's Part-Dieu shopping centre.

Rope climbing is a sport in which competitors, usually men, attempt to climb up a suspended vertical rope using only their hands. Rope climbing is practiced regularly at the World Police and Fire Games, and is enjoying a resurgence in France, where competitions are held in shopping centres. Also, enthusiasts in the Czech Republic resurrected the sport in 1993, and hold local and national competitions.

History and description of the event

This was an Olympic Gymnastic event at one time, but was removed from that venue after the 1932 Games. In the United States, competitive climbing on both 20 ft and 25 ft, 1.5 inch diameter natural fiber ropes was sanctioned by both the AAU and the NCAAOlympic Games held in the USA, competitors climbed a 25 ft (7.62m) rope, but when post-1896 Games were held in Europe, an 8m (26.3 ft) rope was used. In almost all contests, athletes climbed for speed, starting from a seated position on the floor and using only the hands and arms. Kicking the legs in a kind of "stride" was normally permitted. However, at the 1896 Olympic Games, competitors were ranked by both time and style (holding an L-position) on a rope so long (15 meters) that some climbers did not reach the top and were therefore excluded. In all succeeding Olympics through the 1932 Games, competitors were judged strictly by time of ascent on a shorter rope. until the early 1960s, when these organizations dropped the events. As a result, intercollegiate competition in the USA disappeared at this time. In

At the top of the climb, there was a circular "tambourine" with lampblack on its undersurface, which the climber touched. Several timers with stop watches timed the climb, and an acceptable official time was then agreed upon. Before the event expired in America, an electronic means of timing the climb was developed, but this was insufficient reason to continue an activity conducted at gymnastic meets that many artistic gymnasts thought should have been relegated to the track & field arena. The world record for the 20' climb was 2.8 seconds, first achieved by the American Don Perry in the 1950s.

The modern version of the sport incorporates an electronic timing device.

Position fixing

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Position fixing is the branch of navigation concerned with the use of a variety of visual and electronic methods to determine the position of a ship, aircraft or person on the surface of the Earth.

These techniques include:

Positions may be expressed as a bearing and range from a known landmark or as an angles of latitude and longitude relative to a map datum.

Generally speaking a position fix is calculated by taking into account measurements (referred to as observations) of distances or angles to reference points whose positions are known. In 2D surveys observations of three reference points are enough to compute a position in a two dimensional plane. In practice observations are subject to errors resulting from various physical and atmospheric factors which influence the measurement of distances and angles.

A practical example of obtaining a position fix would be for a ship to make distance measurements to three lighthouses positioned along the coast. These measurements could be made by using optical equipment or a timing signal transmitted by radio. Since all physical observations are subject to errors the resulting position fix is also subject to error. In fact the errors in the observations propagate and are 'magnified' when combined. The area of doubt surrounding a position fix is called an error ellipse.

In order to minimize this error, navigation systems generally use more than three reference points in order to compute a position fix. This approach is referred to as redundancy. As more redundant reference points are added the position fix becomes more accurate and the area of the resulting error ellipse decreases.

The process of combining multiple observations in this way in order to compute a position fix is equivalent to solving a system of linear equations. Navigation systems use regression algorithms such as Least squares in order to compute a position fix in 3D space. This is most commonly done by combining distance measurements to 4 or more GPS satellites which orbit the earth along paths of predetermined position.

Bouldering

Bouldering

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Bouldering is a style of rock climbing undertaken without a rope and normally limited to very short climbs so that a fall will not result in serious injury. It is typically practiced on large boulders or artificial man-made boulders. However, it may also be practiced at the base of larger rock faces, or even on buildings or public architecture (see buildering).

Bouldering Basics

A climber with chalked-up hands and a crash pad on the ground. (Black Mountain, Idyllwild, California, US)
A climber with chalked-up hands and a crash pad on the ground. (Black Mountain, Idyllwild, California, US)

Bouldering is a style of climbing emphasizing power, strength, and dynamics. Its focus is on individual moves or short sequences of moves, unlike traditional climbing or sport climbing, which generally demand more endurance over longer stretches of rock where the difficulty of individual moves is not as great. Boulder routes are commonly referred to as problems (a British appellation) because the nature of the climb is often short, curious, and much like problem solving. Sometimes these problems are eliminates, meaning certain artificial restrictions are imposed.

To reduce the risk of injury from a fall, climbers rarely go higher than 3-5 meters above the ground (anything over 7 meters is generally considered to be free-soloing, although such climbs might also be termed high-ball bouldering problems). For further protection, climbers typically put a bouldering mat (crash pad) on the ground to break their fall. Lastly, climbers often have one or more spotters, who work to direct the climber's body toward the crash pad during a fall, while protecting the climber's head from hazards.

Bouldering is increasing in popularity; bouldering areas are common in indoor climbing gyms and some climbing gyms are dedicated solely to bouldering. Children are joining the sport now as well as adults. In fact, studies have found that young climbers develop better skills as adults from their experience with youthful disadvantages such as height and strength.[citation needed]

Equipment

One of the major appeals of bouldering is its relatively scant equipment requirements. Although nothing is actually required, common equipment includes:

  • Loose, powdered chalk as a hand drying agent while climbing.
  • A mattress-like object called a crash pad. These are generally thick, rectangular foam pads with a heavy-duty fabric shell. They are opened and placed at the base of a boulder to cover irregularities in the landing and provide some cushion if the climber falls.
  • Climbing shoes, for better traction and edging capabilities.
  • A brush, or several brushes of differing sizes, typically with nylon bristles but sometimes coarse animal hair, is used to clean holds and is often mounted on a telescopic pole to allow greater reach.
  • Sports tape is useful for covering cuts or blisters, as well as providing support for joints that may have been strained.

It is not uncommon to see people bouldering with shoes, a chalkbag, and a small mat to wipe their feet on.

Ratings

Main article: Grade (bouldering)

As in other types of climbing, bouldering has developed its own grading systems for comparing the difficulty of problems. The most commonly used grading systems are the Fontainebleau system which ranges from 1 to 8c+, and the John Sherman V-grade system, beginning at V0 and increasing by integers to a current top grade of V16 (The Wheel of Life by Dai Koyamada in the Grampians, Australia[1]). Both scales are open-ended at the top, and thus the upper grade of these systems is always increasing as boulderers ascend more difficult problems.

History

Bouldering's documented origins may be found in the United Kingdom, France, and Italy in the last quarter of the 19th century [2]. The British coined the word bouldering at that time. For many years, bouldering was usually viewed as training for climbers, although, in the 1930s and late 1940s, Pierre Allain and his companions enjoyed bouldering for its own sake in Fontainebleau, considered by many to be the Mecca of bouldering. The first climber to actually make bouldering his primary specialty (in the mid 1950s) and to advocate its acceptance as a legitimate sport not restricted to a particular area was John Gill, an amateur gymnast who found the challenge and movement of bouldering enjoyable. [3]

Terminology

Bouldering in Saint Just, departement of Cantal, France
Bouldering in Saint Just, departement of Cantal, France
Beta (n.)
Any helpful tips, solutions to problems, guides, tricks, etc that one climber passes on to another, usually about a particular problem (as opposed to tips about bouldering in general, though there is obviously some overlap).
Boulderer (n.)
Any person participating in bouldering; usually synonymous in context with the more general term 'climber'.
Crash pad (n.)
A pad, usually made of foam, placed at the bottom of a boulder problem onto which a climber can land if they fall, reducing the likelihood of some injuries. (A green crash pad is pictured at right under the climber.)
Crimp (n. v.)
A type of hold used when the climber can fit only their fingertips on the hold. A crimp may be 'closed,' in which the thumb is pressed over the index finger to strengthen one's grip, or the crimp may be 'open', where the thumb does not touch the fingers. Closed crimps, while stronger, put more stress on the hand and are generally regarded as posing a higher risk of injury.
Dab (v.)
Touching anything other than the climbing surface in any way, whether intentional or not; it is grounds for immediate termination of a 'send' attempt.
Dyno (n.)
Shortened form of dynamic movement. Essentially any movement that requires the climber to jump or to swing from one hold to another. Technically, a dyno is a move that, if not completed successfully (by catching the next hold), will result in a fall.
Eliminate
Any problem that eliminates some of the holds on a natural way up the boulder, maximizing the total number of climbs in a limited space.
Flag (v.)
Extending a leg as a counter-balance without placing your foot on a hold.
Flash (v.)
Completing a problem on the first try with no falls, but with beta.
Grade (n.)
Boulder problems are ranked by difficulty using a graded system.
Highball (n.)
A term for a boulder that is so high, falling when close to the top could cause serious injury. Some highballs have anchor bolts at the top to allow for protected top-rope climbing.
Hold (n.)
Any rock feature that a climber can use to ascend the problem. These can be cracks, crimps, jugs, places to smear, etc, that can be used in any useful way by the hands or the feet.
Jam (v. n.)
Placing a foot or a hand, usually in a crack, and rotating or loading it so that it can fully support the climber.
Jug (n.)
A hold that is large enough to allow the climber to reach their entire hand around (or inside of), making it a good low-impact hold with, usually with low possibility of injury.
Mantle (v.)
A manoeuver whereby the climber initially pulls down on a hold (usually matched) with enough force to propel them upwards, and then rapidly changes the pulling motion into a downward pushing motion.
Matching (v.)
Matching implies that both climber's feet or hands are on the same hold.
Offwidth (n. adj.)
An awkward crack that is too wide to jam a hand in, yet not wide enough to back and foot. These typically require a combination of several different methods to achieve a good hold.
Onsight (v.)
To send a problem on the first try without falling and with no beta.
Problem (n.)
A sequence of allowed (by choice or mutual agreement as in a competition) holds leading to the top of a boulder. A problem is the bouldering analogue of a route in traditional climbing.
Redpoint (v.)
To climb at maximal effort. Can also refer to the most difficult grade one can climb.
Send (v.)
To successfully climb a problem.
Sit Start (n.)
A start to a problem beginning with the boulderer sitting on either the ground or on a crash pad, at the lowest point of a route. Typically, starting from a sit start increases the difficulty of a route.
Sloper (n.)
A hold that tends to slope, or is round. Sometimes very difficult to grasp.
Smear (v.)
Pushing with the ball of the foot where there is no hold.
Spot (v.), Spotting (n.)
The act of being a spotter: this may include duties such as moving the crash pad, removing dangerous objects in the fall zone, and physically cushioning or modifying the trajectory of the climber in the event of a fall.
Spotter (n.)
A person who tends to the safety of the climber, who 'spots'.
Traverse (v. n.)
Generally a horizontal climb that involves traversing across a face or overhang, or sometimes around a boulder, occasionally finishing off at an arête in order to top out.
Top out (v.)
To complete a problem by getting to the top of the boulder where one can stand upright.

Bouldering Areas

The region around Fontainebleau near Paris is particularly famous for its beautiful and concentrated bouldering sites. Well-known areas include Stanage (UK), Hueco Tanks (Texas), Castle Hill (New Zealand), Bishop (California), Yosemite (California), Rocktown (Georgia), Rocklands (South Africa), Hampi (India)[4] and Horse Pens 40 (Alabama) amongst others.

Ice climbing

Ice climbing

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Ice climbing, as the term indicates, is the activity of ascending inclined ice formations. Usually, ice climbing refers to roped and protected climbing of features such as icefalls, frozen waterfalls, and cliffs and rock slabs covered with ice refrozen from flows of water. Ice climbing is broadly divided into two spheres, alpine ice and water ice. Alpine ice is found in a mountain environment, usually requires an approach to reach, and is often climbed in an attempt to summit a mountain. Water ice is usually found on a cliff or other outcropping beneath water flows. Alpine ice is frozen precipitation whereas water ice is a frozen liquid flow of water. Both types of ice vary greatly in consistency according to weather conditions. Ice can be soft, hard, brittle or tough.[1]


Techniques

Top-roping
Top-roping

A climber chooses equipment according to the slope and texture of the ice. For example, on flat ice, almost any good hiking or mountaineering boot will usually suffice, but for serious ice climbing double plastic mountaineering boots (or their older stiff leather equivalent) are usually used, which must be crampon compatible and stiff enough to support the climber and maintain ankle support. On short, low angled slopes, one can use an ice axe to chop steps. For longer and steeper slopes or glacier travel, crampons are mandatory for a safe climb. Vertical ice climbing is done with crampons and ice axes (those specific to vertical ice generally being called ice tools); climbers kick their legs to engage the front points of the crampons in the ice, and then swing the axe into the ice above their heads. This technique is known as front pointing. The strength of the ice is often surprising; even if the axe goes in only a centimeter or so it is enough to pull up on. If a climber is leading, s/he will need to place ice screws as protection on the way up (see climbing system). Most mountaineers would only consider the last scenario true ice climbing; the less steep variations are routine aspects of winter mountaineering.

Some important techniques and practices common in rock climbing that are employed in ice climbing include knowledge of rope systems, tying in, belaying, leading, abseiling, and lowering. Beginners should learn these techniques before attempting to ice climb. It is highly recommended that one acquire knowledge from experts and experienced ice climbers.

Rope systems

Single, double, and twin rope are the three main rope systems used in ice climbing. The single rope system, which is suited for straight climbing routes, is the most commonly used system in the world. Also often used in climbing is the double rope system which is a more flexible system than the single rope system. Lastly, the twin rope system, which uses two twin ropes in a single rope system, is used for longer multi-pitch routes. However, this type is not often used in climbing.

Tying in

Tying in entails attaching your rope to the climbing harness. This technique is a must particularly when leading a climb or belaying. The commonly used tie-in knot is the Figure-of-eight follow through. Once you tie-in, you will create a belay loop which will contain your belay device when needed. This technique should be done properly to ensure your safety when ice climbing.

Belaying

In this climbing technique, you are going to use either running belays or fixed belays. A running belay on ice is similar to a running belay on rock or snow. The leader of the climb puts protection and clips the rope through it. The next climber puts away the protection. There should be at least two points of protection between the leader and the next climber. Fixed belays, on the other hand, require a belayer, belay anchor, and points of protection. A belay anchor is attached to a cliff in supporting a belay or toprope. In using either a running- or fixed belay, it is necessary that you have enough knowledge on boot/ice-screw belay techniques.

Leading

Leading refers to the act of leading a climb and thus, requires a leader and a follower. This ice climbing technique entails putting protection while ascending. In doing so, leading is done in sections. The leader places the protection as he climbs until he reaches the top. Then, as the second climber climbs, he removes the protection placed by the leader. When the second climber finishes, they both proceed to the second pitch.

Abseiling

Also called rappelling, abseiling uses a fixed rope to descend. This technique is not only used to go down after a climb. It can also be used when trying new climbing routes and when there is a seemingly difficult access to the start of a climb. Careful execution is important in doing abseiling. There are the possibilities of jammed ropes, ropes becoming severed after getting in contact with sharp edges, and other cases of equipment failure.

Lowering

Lowering is one of the most common methods of getting down. A belayer at the base of the vertical wall ensures that the climber is lowered safely. This climbing technique is used when going down routes where there are short, steep walls. This is also used when you want to go down faster.

These are the different techniques used in climbing activities. Keep in mind, though, that it is very crucial to learn these skills from expert climbers before attempting them yourself.

Protecting ice

Ice screw
Ice screw

Compared to rock, ice can be difficult to protect. Today the most common protection for ice climbing is an ice screw. Ice screws are hollow tubes with sharp teeth on the front end, a hanger eye at the back to clip into, and threading around the tube. They are screwed into the ice and can provide very strong protection in solid ice.[1] However, because of the variable nature of ice, the strength of ice screw placements can vary greatly.[2]

Ice climbers also use the ice itself as protection. The two most common of such techniques are the V-Thread (also known as the "Abalokov" anchor, named after a Russian climber who popularised the technique) and the ice bollard. The V-thread is a method of protection in which two tunnels are bored into the ice so that the intersect at their ends intersect forming a "V" shaped tunnel in the ice. A sling or cordelette (rope used in anchors) is threaded through the tunnel and tied making a loop that is tied into the ice. An ice bollard is a made when an horse-shoe shaped furrow is carved into less than vertical ice with the open end down. A lip is then sculpted in the lower wall of the furrow so that a loop of rope can be placed in the furrow that will stay in place in a somewhat less severe version of a loop of rope around saddle horn.[2]

Natural formations, as well as ice hooks and ice pitons are also used as protection anchors by ice climbers.

Ice climbing grades

Waterfall ice grading

The Canadian Rockies is widely recognised as the centre of the Ice Climbing universe, due to the vast amount of excellent ice within easy access. This discussion focuses on the waterfall ice rating system as used in the Canadian Rockies.

Testpiece examples are given. Note that ice grading, even more so than other climbing media, tends to be subjective and often does not reflect the difficulty of a route at any given time. Routes become much easier after the first ascent of the season. This is due to the cleaning of chandeliered ice and creation of "hooks", which are pockets formed by the tools' picks, reducing the effort expended in cleaning and tool placement.

Routes with high-flow seeps also tend to become easier as the season progresses due to the increase in volume of ice. Low-flow seeps, however (e.g. French Reality, Banff; Moonlight/Snowline, Kananaskis), often form early in the season (September-November) when the flow is good from latent summer heat, and then slow down or even stop with the deepening winter frost; subsequent ablation (and destruction by climbing) of the ice often makes for thinner and brittler ice with time.

Grading in the Canadian Rockies, especially recently, focuses on the steepness of a pitch, and NOT on the more subjective "feeling of difficulty" (mental aspects, e.g. protectability, exposure, commitment, etc.) or "technical difficulty" (e.g. chandeliers, bonding, etc.) during the first ascent. Hence the downgrading of several notorious routes, e.g. Sea of Vapours, which were in poor conditions during the first ascents.

A common use of the "+" designation is to indicate a higher level of technicality than is typical for the grade (e.g. chandeliers, poor bonding, etc.) that is consistent from year to year (i.e Wicked Wanda, WI4+, has vicious mushrooms on an otherwise low-angled route, and these features always exist from year to year, probably due to the winds).

Finally, Canadian Rockies WI grading does NOT have anything to do with whether a climb is multi-pitch or not. Therefore, a 4-pitch WI5 is not granted WI6 just because it's long, and likewise a 4-pitch WI6 is not given WI7.

WI2 - low-angled (60 degree consistent ice), with good technique can be easily climbed with one ice axe

WI3 - generally sustained in the 60-70 degree range with occasional near-vertical steps up to 4 metres (Cascade Waterfall, Banff; This House of Sky, Ghost River)

WI4 - near-vertical steps of up to 10 metres, generally sustained climbing requiring placing protection screws from strenuous stances (Professor's Falls, Banff; Weeping Wall Left, Icefields Parkway, Banff; Silk Tassle, Yoho; Moonlight & Snowline, Kananskis)

WI4+ - highly technical WI4, notoriously as "hard" as WI5 or even WI6! (Wicked Wanda, Ghost River)

WI5 - near-vertical or vertical steps of up to 20 metres, sustained climbing requiring placing multiple protection screws from strenuous stances with few good rests (Carlsberg Column, Field; The Sorcerer, Ghost River; Bourgeau Left Hand, Banff)

WI5+ - highly technical WI5, often "harder" than WI6 (Oh le Tabernac, Icefield Parkway; Hydrophobia, Ghost River; Sacre Bleu, Banff)

WI6 - vertical climbing for the entire pitch (e.g. 30-60 metres) with no rests. Requires excellent technique and/or a high level of fitness (The Terminator, Banff; Nemesis, Kootenay Park; Whiteman Falls, Kananaskis Country; Riptide, Banff)

WI6+ - vertical or overhanging with no rests, and highly technical WI6 (French Maid, Yoho; French Reality, Kootenay Park)

WI7 - sustained and overhanging with no rests. Extremely rare, near-mythical, and widely accepted testpiece examples of this grade don't exist in the Canadian Rockies. Note that many routes (e.g. Sea of Vapours, Banff; Riptide, Icefield Parkway, Banff) have been assigned WI7- to WI7+ but have been subsequently downgraded in fatter years as they don't meet the strict criteria of steepness. In fact some local ice climbers have argued for Sea of Vapours (WI7+ originally) to be downgraded to WI5 or even WI4 simply because it's not steep enough.

See Alpinist's Climbing Grades section for a variation on this discussion: http://www.alpinist.com/p//climbing_notes/grades

Mixed ice grading

Roughly follows the WI rating system with respect to its physical and technical demands. Typically starts at M4. Subgrades of "-" and "+" are commonly used, although the distinctions are typically very subjective. The following table makes a comparison with the WI system and the Yosemite Decimal System. Comparing these is rough, and only gives an idea of the relative difficulty; the reason different systems exist in the first place is because it's difficult to compare grades between climbing media.

M4 - 5.8 - WI4 - slabby to vertical, some technical drytooling

M5 - 5.9 - WI5 - some sections of sustained drytooling

M6 - 5.10 - WI6 - vertical to overhanging with some difficult drytooling

M7 - 5.11 - WI7 - overhanging, powerful and technical drytooling, <10>

M8 - 5.11+ - bouldery or longer cruxes than M7, some horizontal overhangs

M9 - 5.12- - vertical or steeper with sustained marginal or highly technical drytooling; or horizontal and juggy for up to a few body lengths.

M10 - 5.12

M11 - 5.12+

M12 - 5.13-

See Alpinist's Climbing Grades section for a variation on this discussion: http://www.alpinist.com/p//climbing_notes/grades

Climbing clubs

Rock and ice climbers and mountaineers often belong to Clubs, some of which were started in the very early days of the sport. Clubs are often responsible for the publication of Climbing Guides. The article Alpine Club lists some of these organizations.

In the UK and Ireland there are several prominent clubs, including:

In the United States and Canada several venerable clubs are:

Rock climbing

Rock climbing

From Wikipedia, the free encyclopedia

Rock climbing is known as an extreme sport. Broadly speaking, rock climbing is the act of ascending steep rock formations. Usually climbers use gear and safety equipment specifically designed for the purpose. Strength, endurance, and mental control, as well as agility and balance, are required to cope with tough, dangerous physical challenges. Knowledge of climbing techniques and the use of essential pieces of gear and equipment are crucial. The variety of rocks around the world has led rock climbing to separate into several disciplines, including top-roping, sport climbing, traditional climbing and bouldering.

History

Although of rock climbing was an important component of Victorian mountaineering in the Alps, it is generally thought that the sport of rock climbing began in the last quarter of the nineteenth century in various parts of Europe. Rock climbing evolved gradually from an alpine necessity to an athletic sport in its own right. As rock climbing matured, grading systems were created in order to more accurately compare the relative difficulties between climbs. Over the years, both climbing techniques and the equipment climbers use to advance the sport have steadily evolved.

[edit] Rock climbing basics

Rock climbers in Yosemite National Park
Rock climbers in Yosemite National Park

Climbers usually work in pairs. One climber climbs with the other belaying. In lead climbing, the belayer feeds rope to the lead climber through a belay device. The leader climbs, occasionally placing protection or clipping preplaced bolted hangers, until the top is reached. The belayer is ready to "lock off" the rope in case the leader falls.

Both climber and belayer attach the rope to their climbing harness. The rope is tied into the climber's harness with a figure-of-eight loop or double bowline knot. The leader either places his own protection (Traditional climbing) or clips into permanent protection already attached to the rock (Sport climbing). In traditional climbing, the protection is removable. Usually nuts or Spring-loaded camming device (often referred to as "cams" or "friends") are set in cracks in the rock (although pitons are sometimes used). In sport climbing the protection is metal loops called bolts. Bolts are secured to the rock with either expanding masonry bolts taken from the construction industry, or by placing glue-in bolt systems. In ice climbing the protection is made-up of Ice Screws or similar devices hammered or screwed into the ice by the leader, and removed by the second climber.

The lead climber typically connects the rope to the protection with carabiners or quickdraws. If the lead climber falls, he will fall twice the length of the rope from the last protection point, plus rope stretch (typically 5% to 8% of the rope out), plus slack. If any of the gear breaks or pulls out of the rock or if the belayer fails to lock off the belay device immediately, the fall will be significantly longer. Thus if a climber is 2 meters above the last protection he will fall 2 meters to the protection, 2 meters below the protection, plus slack and rope stretch, for a total fall of over 4 meters.

If the leader falls, the belayer must arrest the rope to stop the fall. To achieve this the rope is run through a belay device attached to the belayer's harness. The belay device runs the rope through a series of sharp curves that, when operated properly, greatly increases friction and stops the rope from running. Some of the more popular types of belay devices are the ATC Belay Device, the Figure 8 and various auto-locking belay devices such as the Petzl Gri-Gri

If the route being climbed is a multi-pitch route the leader sets up a secure anchor system at the top of the pitch, also called a belay, from where he can belay as his partner climbs. As the second climber climbs, he/she removes the gear from the rock in case of traditional climbing or removes the quickdraws from the bolts in the case of sport climbing. Both climbers are now at the top of the pitch with all their equipment. Note that the second climber is protected from above while climbing, but the lead climber is not, so being the lead climber is more challenging and dangerous. After completing the climb, and with both climbers at the top of the pitch, both climbers must rappel or descend the climb in order to return to their starting point. All climbs do not necessarily require the lead climber to belay the second climber from the top. The belayer could lower the lead climber down after he/she has completed a single pitch route.

Occasionally, climbers may decide to "move together", a risky but speedy technique also called simul-climbing, in which both leader and second move at the same time without stopping to belay. The leader - approximately a rope length above the second - usually places multiple pieces of protection as he climbs so that the weight of the second climber might arrest a possible leader's fall. Should the second climber fall, however, the leader may be pulled from his holds, with potentially dangerous results.

Types of rock climbing

Rock climbing may be divided into two broad categories: free climbing and aid climbing.

  • Free climbing requires the climber use only his/her bodily strength for upward progress. Commonly confused with "free-soloing" which means to climb without a rope. The essence of free climbing is that, although gear may be used to protect a climber in the event of a fall, the actual "climbing" is being done without the help of any artificial device.
  • Aid climbing involves using artificial devices placed in the rock to support all or part of the climber's body weight, and is normally practiced on rock formations that lack the necessary natural features suitable for free climbing.

Other kinds of climbing:

Climber leading the sport route Spud Boy,  Clark Canyon, California, United States
Climber leading the sport route Spud Boy, Clark Canyon, California, United States
  • Lead climbing is a method of climbing in which the climber (here called the "leader") climbs a route from the ground up. To protect him/herself, the climber trails a rope which is managed by a belayer who remains on the ground or at an established anchor. As the leader climbs, he/she can either clip the trailed rope through pieces of traditional gear (cams, stoppers), placed in cracks, or clip the rope through gear already in place (bolts, pitons). If a climber falls while leading, he/she cannot comfortably sit back on the rope and be held by the belayer as in toproping (where the rope is anchored above the climber); rather, the leader will fall twice the distance between his/her position and the most recent piece of protection (a cam, stopper, bolt, etc.) that he/she clipped the rope through (assuming this piece of protection holds).
  • Traditional Climbing, or "Trad" Climbing. In Trad Climbing, the leader uses mostly removable gear (and the occasional bolt placed on lead) to protect against falls. As in all forms of lead climbing, the climbing team (a leader and follower, or multiple followers) begins at the bottom of a climb and ascends to the top, the leader placing protective devices in the rock as he/she climbs. Once the leader is finished climbing, he/she establishes a belay. The follower then "follows" the route and removes all of the gear placed by the leader. It is important that the leader be proficient at placing Trad (or clean or natural) gear (cams, stoppers, hexes, tri-cams, etc.) because his/her safety depends upon the soundness of each individual gear placement. Placing trad gear on lead can be time-consuming and thus tiring, sometimes making routes feel harder than their rating. Trad climbing is generally practiced according to ethical principles, that dictate primarily natural gear placements be made. However, when "traditional" was first coined in U.S. climbing literature,[1] traditionalists of the day permitted themselves hand drilled bolts sometimes from delicate stances on lead when cams, stoppers, etc. were not possible to place. Some of the resulting traditional routes have long run outs between bolts, requiring a "bold" mentality. More important to the original traditionalists than bolting or not was the overall approach to climbing: no resting on the rope after falls, instead lowering to a stance or pitch beginning or even the ground for restart; no placing of protection from a top rope or rehearsing difficult moves over and over; and no fixing of ropes to high points (sieging) to return with aid for repeated tries. It is, with perhaps the exception of climbing with no rope and prior knowledge of a route Free-soloing, the purest form of climbing. Since the term traditional first emerged in U.S. climbing literature, its use has changed. Some, for example, now will call a climbing style "trad" only if no bolts are encountered, and may relax the old restraint of lowering off tension for restarts after a fall.
  • Sport climbing is a type of lead climbing which involves the use of pre-placed permanent bolts for protection. This frees the leader from the need to carry and place traditional gear. The leader merely clips one side of a quickdraw (two carabiners connected by a loop of webbing) into a bolt and the other into the rope. A typical sport route will require the leader to carry between 6 and 12 quickdraws or "draws," one for each bolt in the string of bolts that protect the route. Sport Climbing, in essence, is focused more on the gymnastic aspects of climbing than the aesthetics or adventure. Sport routes are bolted with safety in mind and also because they generally (though not always) ascend faces that are not protectable by any other practical mean. Bolts, however, are not foolproof. The same stringence concerning safety found in Trad. climbing should apply to Sport climbing as well. In the case of a fall, sport climbers often rest on the rope and begin from where they are hanging, called "hang-dogging." Hard sport climbs often require that the climber literally rehearse every single move several times before he/she can complete a clean ascent (without falls).
  • Top Roping involves suspending a rope from an anchor located at the top of a short climb. The climber ties into one end of the rope and is belayed by his belayer who manages the other end of the rope. The belayer can belay either from the top or base of the route. This is distinct from Lead climbing where the climber is not safeguarded by a rope attached to an anchor situated at the top of the route.
  • Bouldering may be described as climbing short, severe routes on boulders or small outcrops. While safety ropes from above are occasionally used, most boulderers feel that the most ethical form of protection is a bouldering mat or pad similar to those used by gymnasts. In addition, other climbers standing on the ground may "spot" the boulderer, to help safely guide his or her fall.
  • Indoor climbing is a form of climbing that can involve bouldering, top roping, and leading in an indoor environment on wood or plastic holds. For most it will be the easiest way to begin the sport.
  • Free solo climbing: Usually describes free climbing without a rope or other protective gear. Free solo climbing is distinguished from solo climbing where a climber progressing alone uses a rope and protection devices including a self belay system.
Short (one-pitch) climbs on the Calico Hills, west of Las Vegas, Nevada
Short (one-pitch) climbs on the Calico Hills, west of Las Vegas, Nevada

1. "Tricksters and Traditionalists, Tom Higgins, Ascent, 1984

Rappelling/abseiling

Main article: Abseiling

Gear and equipment

Main article: Climbing Equipment

Grades

Main article: Grade (climbing)

Climbing communities in many countries, as well as individual regions, have developed their own climbing rating systems. Ratings are a method to communicate or record the consensus difficulty of climbs. See the main article for details of the various systems, and a comparison chart.

Indoor climbing walls

Main article: Climbing wall

In recent years, indoor climbing walls, basically artificial cliffs, have become quite popular. Although climbing walls can be used to train climbers for the outdoors, many climbers enjoy climbing indoor walls regularly and almost never go outside. Indoor climbing is also a competitive sport, and therefore should not be mistaken primarily for a means of training for outdoor rock climbing. They are also used by experienced climbers who hone their skills without the need to travel to rock formations.

Criticism

Although many climbers adhere to "minimal impact" and "leave no trace" practices, rock climbing is sometimes damaging to the environment[citation needed]. However, the impact is often less than other outdoor recreations such as hiking, due in part to the smaller numbers participating in climbing compared to other outdoor sports. Common environmental damages include: soil erosion, litter, abandoned bolts and ropes, human excrement, introduction of foreign plants through seeds on shoes and clothing, and damage to native plant species.

Clean climbing is a style of rock climbing which seeks to minimize some of the negative side-effects of climbing.

Rock climbing is a dangerous sport. Knowledge of climbing technique is crucial for the safety of the climber and their climbing partner.

Climbing

Climbing

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Rock climbers on Valkyrie at The Roaches in Staffordshire, England.
Rock climbers on Valkyrie at The Roaches in Staffordshire, England.
A competitor in a rope climbing event, at Lyon's Part-Dieu shopping centre.
A competitor in a rope climbing event, at Lyon's Part-Dieu shopping centre.

Climbing is the activity of using one's hands and feet (or indeed any other part of the body) to ascend a steep object. It is done both for recreation (to reach an inaccessible place, or for its own enjoyment) and professionally, as part of activities such as maintenance of a structure, or military operations.

Climbing activities include:

  • Mountain climbing (Mountaineering): Ascending mountains for sport or recreation. It often involves rock and/or ice climbing.
  • Rock climbing: Ascending rock formations, often using climbing shoes and a chalk bag. Equipment such as ropes, bolts, nuts, hexes and camming devices are normally employed, either as a safeguard or for artificial aid.
  • Ice climbing: Ascending ice or hard snow formations using special equipment designed for the purpose, usually ice axes and crampons. Protective equipment is similar to rock climbing, although protective devices are different (ice screws, snow wedges).
  • Bouldering: Ascending boulders or small outcrops, often with climbing shoes and a chalk bag or bucket. Usually, instead of using a safety rope from above, injury is avoided using a crash pad (a combination of high and low density foam, within a heavy duty fabric structure, often transported on the back) and a human spotter (to direct a falling climber on to the pad).
  • Buildering: Climbing urban structures - usually without equipment - avoiding normal means of ascent like stairs and elevators. Aspects of buildering can be seen in the art of movement known as Parkour.
  • Tree climbing: Ascending trees without harming them, using ropes and other equipment. This is a less competitive activity than rock climbing.
  • Rope climbing: Climbing a short, thick rope for speed. Not to be confused with roped climbing, as in rock or ice climbing.
  • Pole climbing (lumberjack): Lumberjack tree-trimming and competitive tree-trunk or pole climbing for speed using spikes and belts.

Rock, ice, and tree climbing all usually use ropes for safety or for aid. Pole climbing and rope climbing were among the first exercises to be included in the origins of modern gymnastics in the late 18th century and early 19th century.

In popular culture

Climbing has been featured in many popular movies, such as Cliffhanger and Mission: Impossible II, but is usually inaccurately portrayed by Hollywood movies and popular media. Exceptions include the films The Eiger Sanction and Touching the Void. The sport of rock climbing was swept up in the extreme sport craze in the late 1990s which led to images of rock climbers on everything from anti-perspirant and United States Marine Corps commercials, to college promotional materials. Both pole and rope climbing can be seen in circus performances, such as Cirque du Soleil. The sport of rope climbing was once an official gymnastic event in the Olympic Games, but was dropped after 1932. The Czech republic and France have resurrected it and contests are held in public gathering places, such as shopping centers, as well as in gymnasiums. Pole and mast climbing were popular in the 18th and 19th century in village festivals in certain parts of Europe, and were still part of the physical education curriculum at the United States Naval Academy in the 1960s.

An ice climber using special equipment.
An ice climber using special equipment.


Ten Essentials

Ten Essentials

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The Ten Essentials comprise the basic equipment that many consider essential in the backcountry. These items are recommended as the very minimum materials necessary to increase the likelihood of survival when in the field. The Ten Essentials are normally carried in a small, separate waterproof container or pack so that they can always be carried on person, and are thus less likely to be lost. In the event that a hiker loses the bulk of his equipment, these ten essentials ensure that the individual will have the fundamental materials needed to have or improvise the human needs for food, shelter, and fire, and in some instances, the ability to navigate out of dangerous circumstances. Although they are referred to as the "Ten Essentials," the list is generally supplemented by a several additions, such as a plastic tarp, duct tape, sewing kit, etc.

The Ten Essentials were first described in the 1930s by The Mountaineers, a hiking and mountain climbing club. Many hikers, backpackers, and climbers[1] rigorously ensure they have the ten essentials with them.

According to the standard textbook Mountaineering: The Freedom of the Hills,[2] the ten essentials are:

  1. Map
  2. Compass (optionally supplemented with a GPS receiver)
  3. Sunglasses and sunscreen
  4. Extra food and water
  5. Extra clothes
  6. Headlamp/flashlight
  7. First aid kit
  8. Fire starter
  9. Matches
  10. Knife

The textbook recommends supplementing the ten essentials with:

Not every expedition will require the use of an essential item. However, carrying these basics makes sure that one is prepared for unexpected emergencies in the outdoors. For instance, if a hiker experiences a sudden snow storm, it is imperative that he have fresh clothes and fire starter to keep himself warm; otherwise it is likely that he will suffer hypothermia, and perhaps death. In most circumstances, the Ten Essentials will transform a potentially life threatening experience into a mere discomfo

Hypothermia

Hypothermia

From Wikipedia, the free encyclopedi


Hypothermia is a condition in which an organism's temperature drops below that required for normal metabolism and bodily functions. In warm-blooded animals, core body temperature is maintained near a constant level through biologic homeostasis. But when the body is exposed to cold its internal mechanisms may be unable to replenish the heat that is being lost to the organism's surroundings.

Hypothermia is the opposite of hyperthermia, the condition which causes heat exhaustion and heat stroke

Symptoms

Normal body temperature in humans is 37 °C (98.6 °F). Hypothermia can be divided in three stages of severity. In stage 1, body temperature drops by 1-2°C below normal temperature (1.8-3.6°F). Mild to strong shivering occurs. The victim is unable to perform complex tasks with the hands; the hands become numb. Blood vessels in the outer extremities constrict, lessening heat loss to the outside air. Breathing becomes quick and shallow. Goose bumps form, raising body hair on end in an attempt to create an insulating layer of air around the body (which is of limited use in humans due to lack of sufficient hair, but useful in other species). Often, a person will experience a warm sensation, as if they have recovered, but they are in fact heading into Stage 2. Another test to see if the person is entering stage 2 is if they are unable to touch their thumb with their little finger; this is the first stage of muscles not working.

In stage 2, body temperature drops by 2-4°C (3.6-7.2°F). Shivering becomes more violent. Muscle mis-coordination becomes apparent. Movements are slow and labored, accompanied by a stumbling pace and mild confusion, although the victim may appear alert. Surface blood vessels contract further as the body focuses its remaining resources on keeping the vital organs warm. The victim becomes pale. Lips, ears, fingers and toes may become blue.

In stage 3, body temperature drops below approximately 32 °C (89.6 °F). Shivering usually stops. Difficulty speaking, sluggish thinking, and amnesia starts to appear; inability to use hands and stumbling is also usually present. Cellular metabolic processes shut down. Below 30 °C (86.0 °F), the exposed skin becomes blue and puffy, muscle coordination becomes very poor, walking becomes almost impossible, and the victim exhibits incoherent/irrational behavior including terminal burrowing or even a stupor. Pulse and respiration rates decrease significantly but fast heart rates (ventricular tachycardia, atrial fibrillation) can occur. Major organs fail. Clinical death occurs. Because of decreased cellular activity in stage 3 hypothermia, the body will actually take longer to undergo brain death.

Treatments

Treatment for hypothermia consists of drying, sheltering, and gradually warming (making sure to not rub the patient's body, to warm with blankets and, if possible, to transfer your own body heat). While blankets help a person retain body heat, they are not sufficient to treat hypothermia. It is vital that you warm the core of the body first or the cold blood will be forced towards the heart and may cause death. In the field, a mildly hypothermic person can be effectively rewarmed through close body contact from a companion and by drinking warm, sweet liquids.

Moderate and severe cases of hypothermia require immediate evacuation and treatment in a hospital. In hospital, warming is accomplished by external techniques such as heated blankets for mild hypothermia and by more invasive techniques such as warm fluids injected in the veins or even lavage (washing) of the bladder, stomach, chest and abdominal cavities with warmed fluids for severely hypothermic patients.[citation needed] These patients are at high risk for arrhythmias (irregular heartbeats), and care must be taken to minimize jostling and other disturbances until they have been sufficiently warmed, as these arrhythmias are very difficult to treat while the victim is still cold.

An important tenet of treatment is that a person is not dead until they are warm and dead. Remarkable accounts of recovery after prolonged cardiac arrest have been reported in patients with hypothermia. This is presumably because the low temperature prevents some of the cellular damage that occurs when blood flow and oxygen are lost for an extended period of time.

Prevention

Appropriate clothing helps to prevent hypothermia. Wearing cotton in cool weather is a particular hypothermia risk as it retains water, and water rapidly conducts heat away from the body. Even in dry weather, cotton clothing can become damp from perspiration, and chilly after the wearer stops exercising. Synthetic and wool fabrics provide far better insulation when wet and are quicker to dry. Some synthetic fabrics are designed to wick perspiration away from the body. In air, most heat (up to 40 percent) is lost through the head;[1] hypothermia can thus be most effectively prevented by covering the head.

Heat loss on land is very difficult to predict due to multiple variables such as clothing type and quantity, amount of insulating fat on the victim, environmental humidity or personal dampness such as after exertion, the circumstances surrounding the hypothermic episode and etc. Heat is lost much faster in water, hence the need for wetsuits or drysuits in cold-weather activities such as kayaking. Water temperatures that would be quite reasonable as outdoor air temperatures can lead to hypothermia very quickly. For example, a water temperature of 10 degrees Celsius (50 F) can be expected to lead to death in approximately 1 hour, and water temperatures hovering at freezing can lead to death in as little as 15 minutes. [2] But even a temperature as high as 80 degrees Fahrenheit will eventually lead to hypothermia in water! [1]

Alcohol consumption prior to cold exposure may increase one's risk of becoming hypothermic. Alcohol acts as a vasodilator, increasing blood flow to the body's extremities, thereby increasing heat loss.[3] Ironically, this may cause the victim to feel warm while he or she is rapidly losing heat to the surrounding environment.

Benefits

There is considerable evidence that children who suffer near-drowning accidents in water near 0°C (32°F, 273 K) can be revived over an hour after losing consciousness[4]. The cold water considerably lowers metabolism, allowing the brain to withstand a much longer period of hypoxia.

Medically induced

Main article: induced hypothermia

Paradoxical undressing

20% to 50% of hypothermal deaths are associated with a phenomenon known as paradoxical undressing. This typically occurs during moderate to severe hypothermia as the victim becomes disoriented, confused, and combative. The hypothermic victim may begin discarding the clothing he or she has been wearing, which in turn increases the rate of temperature loss.[5] There have been several published case studies of victims throwing off their clothes before help reached them. [6]

Rescuers who are trained in mountain survival techniques have been taught to expect this effect. However, the phenomenon still regularly leads police to assume incorrectly that urban victims of hypothermia have been subjected to a sexual assault.[citation needed]

One explanation for the effect is a cold-induced malfunction of the hypothalamus, the part of the brain that regulates body temperature. Another explanation is that the muscles contracting peripheral blood vessels become exhausted (known as a loss of vasomoter tone) and relax, leading to a sudden surge of blood (and heat) to the extremities, fooling the victim into feeling warm. (These are cited from the magazine "New Scientist" and are not Journal articles)


Ankle

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Ankle
Lateral view of the human ankle
Latin articulatio talocruralis
Gray's subject #95 349
MeSH Ankle+joint
Dorlands/Elsevier a_64/12161605

In human anatomy, the ankle joint is formed where the foot and the leg meet. The ankle, or talocrural joint, is a synovial hinge joint that connects the distal ends of the tibia and fibula in the lower limb with the proximal end of the talus bone in the foot.[1] The articulation between the tibia and the talus bears more weight than between the smaller fibula and the talus.

The term "ankle" is used to describe structures in the region of the ankle joint proper.[2]

Movement

The ankle joint is responsible for dorsiflexion (moving the toes up as when standing only on the heels) and plantar flexion of the foot (moving the toes down, as when standing on the toes), and allows for the greatest movement of all the joints in the foot. The ankle does not allow rotation.

In plantar flexion, the anterior ligaments of the joint become longer while the posterior ligaments become shorter. The reverse is true for dorsiflexion.

Articulation

The lateral malleolus of the fibula and the medial malleolus of the tibia along with the inferior surface of the distal tibia articulate with three facets of the talus. These surfaces are covered by cartilage.

The anterior talus is wider than the posterior talus. When the foot is dorsiflexed , the wider part of the superior talus moves into the articulating surfaces of the tibia and fibula, creating a more stable joint than when the foot is plantar flexed.

Ligaments

The ankle joint is bound by the strong deltoid ligament and three lateral ligaments: the anterior talofibular ligament, the posterior talofibular ligament, and the calcaneofibular ligament.

  • The deltoid ligament supports the medial side of the joint, and is attached at the medial malleolus of the tibia and connect in four places to the sustentaculum tali of the calcaneus, calcaneonavicular ligament, the navicular tuberosity, and to the medial surface of the talus.
  • The anterior and posterior talofibular ligaments support the lateral side of the joint from the lateral malleolus of the fibula to the dorsal and ventral ends of the talus.
  • The calcaneofibular ligament is attached at the lateral malleolus and to the lateral surface of the calcaneus.

The joint is most stable in dorsiflexion and a sprained ankle is more likely to occur when the foot is plantar flexed. This type of injury more frequently occurs at the anterior talofibular ligament.

Name derivation

The word ankle or ancle is common, in various forms, to Germanic languages, probably connected in origin with the Latin "angulus", or Greek "αγκυλος", meaning bent.

Related terms

A common variant of the word "ankle" is "cankle", which is commonly used derogatorily to describe the ankles of obese individuals where the ankle and calf may be indistinguishable. This insult can be taken further (often jokingly) using the term "thankle", which implies a person's thighs and ankles are indistinguishable.

Fractures

Evaluation of ankle injuries for fracture is done with the Ottawa ankle rules, a set of rules that were developed to minimize unnecessary X-rays.

Additional images

Hiking2

Hiking

From Wikipedia, the free encyclopedia


Eagle Creek, Oregon hiking
Eagle Creek, Oregon hiking
Symbols used in trail blazing
Symbols used in trail blazing

Hiking is a form of walking, undertaken with the specific purpose of exploring and enjoying the scenery. It usually takes place on trails in rural or wilderness areas.

The word 'hiking' is understood in all English-speaking countries, but there are differences in usage. In some places, off-trail hiking is called 'cross-country hiking', 'bushwalking', or 'bushbashing'. In the United Kingdom, hiking is a slightly old-fashioned word, with a flavor more of heartiness and exercise than of enjoying the outdoors; the activity described here would be called 'hillwalking' or simply 'walking'. Australians use the term 'bushwalking' for both on- and off-trail hiking. New Zealanders use 'tramping' (particularly for overnight and longer trips), 'walking' or 'bushwalking'. Hiking in the mountainous regions of India and Nepal is sometimes called 'trekking'. Overnight hiking is called 'backpacking' in some parts of the world. Hiking a long-distance trail from end to end is referred to as 'thru-hiking' in some places.


Comparison with other forms of touring

Hiking is one of the fundamental outdoor activities on which many others are based. Many beautiful places can only be reached overland by hiking, and enthusiasts regard hiking as the best way to see nature. It is seen as better than a tour in a vehicle of any kind (or on an animal; see horseback riding) because the hiker's senses are not intruded upon by distractions such as windows, engine noise, airborne dust and fellow passengers. Hiking over long distances or over difficult terrain does require some degree of physical ability and knowledge.

Ecological impact of hiking

Hikers often seek beautiful natural environments in which to hike. Ironically, these environments are often fragile: hikers may accidentally destroy the environment that they enjoy. The action of an individual may not strongly affect the environment. However, the mass effect of a large number of hikers can degrade the environment. For example, gathering wood in an alpine area to start a fire may be harmless once (except for wildfire risk). Years of gathering wood, however, can strip an alpine area of valuable nutrients.

Generally, protected areas such as parks have regulations in place to protect the environment. If hikers follow such regulations, their impact can be minimized. Such regulations include forbidding wood fires, restricting camping to established camp sites, disposing or packing out faecal matter, imposing a quota on the number of hikers per day.

Many hikers espouse the philosophy of Leave No Trace: hiking in a way such that future hikers cannot detect the presence of previous hikers. Practitioners of this philosophy obey its strictures, even in the absence of area regulations. Followers of this practice follow strict practices on dealing with food waste, food packaging, and alterations to the surrounding environment.

Human waste is often a major source of environmental impact from hiking. These wastes can contaminate the watershed and make other hikers ill. Bacterial contamination can be avoided by digging 'catholes' 10 to 25 cm (4 to 10 inches) deep, depending on local soil composition and covering after use. If these catholes are dug at least 60 m (200 feet) away from water sources and trails, the risk of contamination is minimized. Many hikers warn other hikers about the location of their catholes by marking them with sticks stuck into the ground.

Sometimes, hikers enjoy viewing rare or endangered species. However, some species (such as martens or bighorn sheep) are very sensitive to the presence of humans, especially around mating season. Hikers should learn the habits and habitats of the endangered species, in order to avoid adverse impact.

There is one situation where an individual hiker can make a large impact on an ecosystem: inadvertently starting a wildfire. For example, in 2005, a Czech backpacker burned 7% of Torres del Paine National Park in Chile by knocking over an illegal gas portable stove. Obeying area regulations and setting up cooking devices on bare ground will reduce the risk of wildfire.

Etiquette of hiking

Hiking in a group increases safety, but hikers may wish to hike at different rates.
Hiking in a group increases safety, but hikers may wish to hike at different rates.
Crossing a swing bridge on the Huxley River in the South Island of New Zealand.
Crossing a swing bridge on the Huxley River in the South Island of New Zealand.

Because hiking is a recreational experience, hikers expect it to be pleasant. Sometimes hikers can interfere with each others' enjoyment, or that of other users of the land, but they can minimize this interference by following good etiquette. For example:

  • When two groups of hikers meet on a steep trail, there may be contention for use of the trail. To avoid conflict, a custom has developed in some areas whereby the group moving uphill has the right-of-way. In other situations, the larger of the two groups will usually yield to the smaller.
  • Being forced to hike much faster or slower than one's natural pace can be annoying, and difficult to maintain consistently. More seriously, walking unnaturally fast dramatically increases fatigue and exhaustion, and may cause injury. If a group splits between fast and slow hikers, the slow hikers may be left behind or become lost. A common custom is to encourage the slowest hiker to hike in the lead and have everyone match that speed. Another custom is to have an experienced hiker sweep up the rear, to ensure that everyone in the group is safe and nobody straggles.
  • Hikers often enjoy the silence and solitude of their surroundings. Loud sounds, such as shouting or loud conversation, disrupt this enjoyment. Some hikers purposely avoid loud sounds, out of deference to other hikers. Staying quiet will also increase the likelihood of encountering wildlife. (This is a hazard if dangerous animals are present; see "Personal safety hazards".)
  • Hikers sometimes trespass onto private property from public land or rights of way (easements). Such trespass can alienate the property owners and (in countries where rights of way are not protected by law) close down hiking rights-of-way. To maximize hiking opportunities for everyone, most hikers will either stay on public land and easements, or solicit permission from property owners. Staying on well-marked trails avoids the possibility of trespass.
  • Tree branches or other vegetation often hang low across trails. A passing hiker may cause a tree branch to snap back in the face of a hiker behind. While it is courteous to warn following hikers if a branch is likely to snap back, it is every hiker's responsibility to allow enough space between himself and the hiker ahead to avoid the hazard.
  • When two groups of hikers meet, it is considered a common courtesy to exchange greetings (either verbal or physical (e.g. smiles and friendly nods)). To pass another group without such acknowledgement is seen as rude.
Two hikers in the Mount Hood National Forest
Two hikers in the Mount Hood National Forest

Personal safety hazards

Hiking may produce threats to personal safety. These threats can be dangerous circumstances while hiking and/or specific accidents or ailments. Dangerous hiking circumstances include losing the way, inclement weather, hazardous terrain, or exacerbation of pre-existing medical conditions. Specific accidents include metabolic imbalances (such as dehydration or hypothermia), topical injuries (such as frostbite or sunburn), attacks by animals, or internal injuries (such as ankle sprain).

Hikers often propose a set of behavioral prescriptions to minimize these threats. A well-known example of such a set of prescription is the Ten Essentials.


Frostbite


Hands, feet, noses, and ears are most likely to be affected by frostbite
ICD-10 T33.-T35.
ICD-9 991.0-991.3

Frostbite (congelatio in medical terminology) is the medical condition whereby damage is caused to skin and other tissues due to extreme cold. At or below 0° C (32° F), blood vessels close to the skin start to narrow (constrict). This helps to preserve core body temperature. In extreme cold or when the body is exposed to cold for long periods, this protective strategy can reduce blood flow in some areas of the body to dangerously low levels. The combination of cold temperature and poor blood flow can cause severe tissue injury by freezing the tissue. Frostbite is most likely to happen in body parts farthest from the heart, and those with a lot of surface area exposed to cold. The initial stages of frostbite are sometimes called "frostnip". Mountains or high altitudes with snow are most dangerous to cause frostbite.

Risk factors

Risk factors for frostbite include using beta-blockers and having conditions such as diabetes and peripheral neuropathy.

Frostbitten hands
Frostbitten hands

Symptoms

Generally, frostbite is accompanied by discoloration of the skin, along with burning and/or tingling sensations, partial or complete numbness, and possibly intense pain. If the affected areas and blood vessels have been severely damaged, gangrene may follow, and amputation may eventually be required. If left untreated, frostbitten skin gradually darkens and blisters after a few hours. Skin destroyed by frostbite is completely black, and looks loose, flayed and "flexible. The black skin looks burnt.

Treatment

To treat frostbite, move the victim to a warm location and seek medical help. Soak frostbitten areas in warm (not hot) water, or, if in wilderness, warm by contact with the skin of a non-frostbitten person. Continue until the victim has regained sensation and movement in the afflicted region; this often follows great pain as the nerves thaw. Never rub, slap or shake the stricken region as ice crystals in the frostbitten skin will damage surrounding tissue. Follow the treatment with a period of constant warmth: refreezing following thawing exacerbates the damage.

Prevention

Factors that contribute to frostbite include extreme cold, wet clothes, wind chill, and poor circulation. This can be caused by tight clothing or boots, cramped positions, fatigue, certain medications, smoking, alcohol use, or diseases that affect the blood vessels, such as diabetes.

Moreover employees working in chemical laboratories should take precautions to wear gloves and other safety equipment as liquid Nitrogen and other cryogenic liquids can cause frostbite even with brief exposure.

If caught in a severe snowstorm, one should find shelter early or increase physical activity to maintain body warmth.

"Prevention is better than cure"...people susceptible to frostbites should wear woolen socks/gloves/caps in extreme cold. For frostbites in the feet, keeping feet in warm saline water will provide relief. Diabetes can also sometimes lead to frostbite, so diabetics should take precautions as to avoid trips to ice-cold places (consult your physician).

Hiking equipment

Hiking equipment

From Wikipedia, the free encyclopedia


Hiking equipment is gear or equipment that one takes along on an outdoors hiking trip. While hiking is considered different than backpacking (overnight camping), the equipment is of necessity of a shorter term more practical nature for such a walk. However even for a day trip it is prudent to pack at least rudimentary solutions for eventualities that may arise including being forced to stay the night, getting lost, or accidents.

Hiking equipment may be considered in several categories

  • Items Worn - Things that a hiker wears on the hiking trip. This may include footwear, clothing, head gear, etc.
  • Carrying Items - Backpacks, waist packs, walking sticks or staffs, etc.
  • Essential gear - Items that are essential for the hike safety or necessary in potential emergency situations.
  • Food and drink - Food items to consume as snacks, lunch, or in emergencies.
  • Optional Items - Any other items that the hiker desires to bring along including seating pads, chairs, notebooks, hammocks, and yes even computers.

Weight and bulk limit the amount of equipment that one can carry (particularly if one follows the principle of Leave No Trace and does not discard items on the trail). Criteria for packing an item include weight, bulk (size), number of alternative uses and the chances of each of those uses becoming apparent, weighed against the importance. For example, a whistle may seem unlikely to become necessary, but can be real life saver when it does and weighs next to nothing. Other items, like a sleeping bag, can also be important but can also be very restricting, so a simpler alternative like an extra layer of clothing might be a better idea.

First of all, of course, one needs something to carry the equipment in. This can be simple fisherman's jacket or a daypack for short hikes, or a full backpack.


Items Worn

The hiker will generally consider clothing items based on the expected weather and demands of the particular hike location. For example rain or snow would require different gear than a desert environment.

  • Footwear - Many hikers wear hiking boots or shoes. These come in a variety of high top (better ankle support), or low top (more comfortable) styles. Some hikers wear various rugged outdoor sandals. Footwear should be rugged enough for the terrain envisioned (hiking boots for a rocky mountain, vs sneakers on a paved rail trail). Hikers will generally consider water proofing the boots or shoes based on the weather (rain, snow or slush), and the nature of the trail (swampy or wet). Along with footwear most hikers should also consider socks that will help wick sweat from the hiker's feet, provide warmth, and provide buffering inside the shoe.
  • headwear - A hat can provide cooling in the summer, warmth in the snow, and protection from sun.
  • Pocket knife, possibly with a tin opener and a saw.
  • Electric torch (flashlight) plus spare batteries and bulb
  • Map(s) with sufficient detail to be meaningful
  • Compass - roughly knowing which way is North can already make a huge difference. It is also helpful to know the declination from Magnetic North to True North applicable to your location.
  • First aid kit
  • Matches and/or a lighter and possibly a flint or magnifying glass (always work, even when wet)
  • Tinder - plus knowledge how to start a fire. In emergencies, a campfire can be one of the biggest life savers (warmth and signalling) and it is not as easy to make as some might think. A fire also keeps up the spirits, which can also be a life saver.
  • Candles - for light but also a useful aid to start a fire
  • Water flask, plus water if needed
  • Water purification - tablets and/or filter
  • Food - preferably with a low water content to keep the weight down (if water is readily available on the spot)
  • Plastic bags of various types and sizes to keep things dry and pack things out. Ziploc bags are very practical because they are easily closed and opened. Garbage bags can be used to line the backpack with, but also to put in one's shoes to keep the feet warm, even when the socks are already wet.
  • Insect repellent
  • Mat - even a small thin one can make a difference in emergencies
  • Sleeping bag (and/or liner)
  • Clothes - best worn in layers, so one can easily adapt to changing circumstances. So two thin sweaters make more sense than one thick one. Also, on overnight trips, keep one set of clothes dry for evenings and nights (eg a jogging suit) and put the dayclothes back on before you start walking, even if they are wet. You will thank yourself for that during the next evening.
  • A warm hat or cap - even when no cold weather is expected. Per weight and volume, this is the best insulator because a lot of body heat escapes through the head ("If your feet are cold, put on a hat").
  • Big handkerchief - for various purposes, such as a rough water filter, a thin scarf or a bandana to keep the sweat out of one's eyes (should be big enough for that purpose).
  • Rain jacket or parka - preferably either one that fits over the backpack or accompanied by a separate pack liner
  • Boots - worn in boots, that is! Often heavy boots with soles with a thick profile and high heels are recommended to avoid twisted ankles after a misstep, which is one of the worst things that can happen to a solo hiker. However, heavy boots put a lot of weight where it is least desirable and are thus exhausting. A less popular alternative philosophy is to use light trainers with thin soles so one can feel the ground one walks on and avoid making missteps in the first place.
  • Socks - as with boots, special attention should be given to socks (eg, no irritating ridge above the toes). Footwear is obviously essential for long distance walking.
  • Toilet paper or paper napkins - also handy as kindling
  • Sun cream and sun glasses - may be essential for those who are easily sunburnt, eg fair skinned people who rarely go outside. Especially on snow, water or (to a lesser degree) sand. The reflection of snow can lead to snow blindness.

!please note this is a guide only.!

Worth considering

  • Tent and/or ground sheet - the sheet (plus a rope) can be a simple substitute for a tent.
  • Bivy bag or space blanket - a simple substitute for both a tent and a sleeping bag, mostly to keep out wind and rain.
  • Hammock - especially popular in the tropics, to stay away from most insects, especially poisonous ones.
  • Pillow - small or big, preferably inflatable because of bulk (possibly neck pillow). Can be improvised on with clothes or backpack.
  • Mosquito net
  • String - for all sorts of purposes, such as a clothes line
  • Rope - various lengths and girths, for various purposes, eg Parachute cord. Maybe also (copper) wire.
  • Fishing line and fish hooks - extremely light weight, but potentially a life saver. The fishing line is also very versatile (eg for repairing boots)
  • Machete - may be frowned upon or even confiscated in National Parks, but can be essential when one wishes or needs to go off the beaten track, where one may encounter thick vegetation. Also very handy for construction and collecting firewood. Can also double as a spade.
  • Cooking pot or billy
  • Stove and fuel - can be as simple as an Esbit cooker. Esbit blocks are also good firestarters, albeit not too environmentally friendly.
  • Spoon and possibly other eating utensils
  • Rain pants
  • Sarong, shawl or other large cloth - for various purposes, such as a (spare) towel or sleeping sheet (or sleeping bag liner)
  • Scarf - can double as a headdress
  • Gloves
  • Flip flops or sandals - for the evenings or night visits to the toilet (or what ever passes for that)
  • Towel - can double as a scarf or head dress (against the cold)
  • Soap and shampoo - can be frowned upon in National Parks. Preferably bio-degradable. Use sparingly and away from lakes and rivers.
  • Sewing kit, possibly with a scalpel
  • Heliograph - a mirror with a hole in it for signalling airplanes. Requires knowledge of how to use it.
  • GPS
  • Walking stick
  • Notebook
  • Earplugs - some forests can be noisy, especially cicadas in the tropics
  • Elastic bands - various sizes and girths for various purposes
  • Gaffer tape - for quick repairs
  • Condoms - one condom can hold about a liter of water (although a condom without spermicide would be preferable for this purpose)
  • Radio - eg to listen to weather reports
  • Tweezers (if not already in pocket knife) - for removing thorns and such.
  • Spade - for various purposes, eg to dig a cathole.
  • Snacks - preferably of the healthy kind, as emergency 'power food'.
  • Beta light - handy for reading maps and possibly to catch fish at night
  • Black Shoe Polish - Can be used for marking and camouflage or as a fuel for fire, also giving off a smell that can repel animals

Special interests

  • Binoculars - not only for birders
  • Camera plus spare batteries and film/memory card
  • Gaiters - essential for those planning to cross shallow bodies of water or walk through tussock. However gaiters are useless unless worn properly. Always ensure that they are pulled down around the boot, attached to the laces and sufficiently tightened in order to form a waterproof seal around the foot. Gaiters should only be tightened around the calf when crossing water,otherwise they may cut off circulation.
  • Ice axe
  • Hiking rope
  • Snow shoes

Mountaineering

Mountaineering

From Wikipedia, the free encyclopedia

Mountaineering is the sport, hobby or profession of walking, hiking, trekking and climbing up mountains. It is also sometimes known as alpinism, particularly in Europe. While it began as an all-out attempt to reach the highest point of unclimbed mountains, it has branched into specializations addressing different aspects of mountains and may now be said to consist of three aspects: rock-craft, snow-craft and skiing, depending on whether the route chosen is over rock, snow or ice. All require great athletic and technical ability, and experience is also very important.

Technique

Climbers descending a ridge.
Climbers descending a ridge.

Snow

While certain compacted snow conditions allow mountaineers to progress on foot, typically some form of mechanical device is required to travel efficiently over snow and ice. Crampons are devices having 10-12 spikes that are attached to a mountaineers boots, are used on hard snow (neve) and ice to provide additional traction and allow very steep ascents and descents. There are many different varieties, ranging from lightweight aluminum models intended for walking on glaciers to aggressive steel models intended for vertical and overhanging ice and rock. Snowshoes can be used to walk through deep snow approaching the mountain or on lesser slopes up the mountain. Skis can be used almost everywhere snowshoes can and also in steeper, more alpine landscapes although it takes more practice to develop sufficiently strong skiing skills for difficult terrain. The practice of combining the techniques of alpine skiing and mountaineering to ascend and descend a mountain is a form of the sport by itself, called Ski Mountaineering. Ascending and descending a snow slope safely requires the use of an ice axe and many different footwork techniques that have been developed over the last hundred years, originating in Europe. The progression of footwork from the lowest angle slopes to the steepest terrain is first to splay the feet to a rising traverse, to kick stepping, to front pointing the crampons. The progression of the ice axe technique from the lowest angle slopes to the steepest terrain is to use the ice axe first as a walking stick, then a stake, then to use the front pick as a dagger below the shoulders or above, and finally to swing the pick into the slope over the head. This also involves different designs of ice axe depending on the terrain to be covered, and even whether a mountaineer uses one or two ice axes.

Glaciers

When traveling over glaciers, crevasses pose a grave danger. These giant cracks in the ice are not always visible as snow can be blown and freeze over the top to make a snowbridge. At times snowbridges can be as thin as a few inches. Climbers use a system of ropes to protect themselves from such hazards. Basic gear for glacier travel includes crampons and ice axes. Teams of two to five climbers tie into a rope equally spaced. If a climber begins to fall the other members of the team perform a self-arrest to stop the fall. The other members of the team enact a crevasse rescue to pull the fallen climber from the crevasse.

Ice

Multiple methods are used to safely travel over ice. If the terrain is steep but not vertical, then protection in the form of pickets or ice screws can be driven into the snow or ice and attached to the rope by the lead climber. Each climber on the team must clip past the anchor, and the last climber picks up the picket. This allows for safety should the entire team be taken off their feet. This technique is known as Simul-climbing.

If the terrain becomes vertical then standard ice climbing techniques are used.

Ice climbing
Ice climbing

Shelter

“Basecamp” redirects here. For the online project manager, see Basecamp (software).

Climbers use a few different forms of shelter depending on the situation and conditions. Shelter is a very important aspect of safety for the climber as the weather in the mountains is very unpredictable. Tall mountains require many days of camping on the mountain.

Base Camp

The 'Base Camp' of a mountain is an area used for staging an attempt at the summit. Base camps are positioned to be safe from the harsher conditions above. There are base camps on many popular or dangerous summits. Mountains where the summit cannot be reached from base camp in a single day will have additional camps above base camp. For example, the southeast ridge route on Mount Everest has Base Camp plus (normally) camps I through IV.

Hut

The European alpine regions, in particular, have a network of mountain huts (called ‘refuges’ in France, ‘cabanes’ in Switzerland and ‘hytte’ in Norway). Such huts exist at many different heights, including in the high mountains themselves – in extremely remote areas bivouac shelters may have been provided. The mountain huts are of varying size and quality but each is typically centred on a communal dining room and have dormitories equipped with mattresses, blankets or duvets, and pillows – guests are expected to bring and to use their own sleeping bag liner. The facilities are usually rudimentary but, given their locations, huts offer vital shelter, make routes more widely accessible (by allowing journeys to be broken and reducing the weight of equipment needing to be carried), and offer good value. In Europe, all huts are staffed during the summer (mid-June to mid-September) and some are staffed in the spring (mid-March to mid-May). Elsewhere, huts may also be open in the fall. Huts also may have a part that is always open, but unmanned, a so-called winter hut. When open and manned, the huts are generally run by full-time employees, but some are staffed on a voluntary basis by members of Alpine clubs (such as Swiss Alpine Club and Club alpin français). The manager of the hut, termed a guardian or warden in Europe, will usually also sell refreshments and meals – both to those visiting only for the day and to those staying overnight. The offering is surprisingly wide – given that most supplies, often including fresh water, must be flown in by helicopter – and may include glucose-based snacks (such as Mars and Snickers bars) on which climbers and walkers wish to stock up, cakes and pastries made at the hut, a variety of hot and cold drinks (including beer and wine), and high carbohydrate dinners in the evenings. Not all huts do offer a catered service, though, and visitors may need to provide for themselves. Some huts offer facilities for both, enabling visitors wishing to keep costs down to bring their own food and cooking equipment and to cater using the facilities provided. Booking for overnight stays at huts is deemed obligatory, and in many cases is essential as some popular huts – even with over 100 bed spaces - may well be full during good weather and at weekends. Once made, the cancellation of a reservation should be advised to the hut as a matter of courtesy – and, indeed, potentially of safety, as many huts keep a record of where climbers and walkers state they planned to walk to next. Most huts are contactable by telephone and most take credit cards as a means of payment for the service they provide.

Bivy

A bivy or bivouac is simply getting a sleeping bag and Bivouac sack and lying down to sleep. Many times small partially sheltered areas such as cracks in rocks or a trench dug in the snow are used to provide a basic means of shelter. These techniques were originally used only in cases of emergency; however some climbers steadfastly committed to Alpine Style climbing plan on bivying in order to save the weight of a tent when snow conditions are not suitable for a snow cave.

Tent

Tents are the most common form of shelter used on the mountain. A four-season tent is recommended for any camp above timberline in the mountains. Some climbers do not use tents at high altitudes unless the snow conditions do not allow for snow caving. Sometimes walls of snow or rock can be built instead to shelter the tent from high winds and storms. One of the downsides to tenting is that high storm winds and snow loads can be unnerving and may cause the tent to collapse. Constant flapping of the tent fabric can hinder sleep and raise doubts about the security of the shelter in windy conditions.

Snow cave

Snow caves are another way for some climbers to shelter high on the mountain. Unlike tents, snow caves are silent and actually warmer. A correctly made snow cave will hover around freezing, which relative to outside temperatures can be very warm. To build a snow cave easily, one must carrying a snow shovel, which some may consider to be extra equipment. They can be dug anywhere there is at least four feet of snow. Another shelter that works well is a quinzee, which is excavated from a pile of snow that has been work hardened or sintered (typically by stomping). Igloos are used by some climbers, but are deceptively difficult to build and require specific snow conditions.

Hazards

The craft of climbing has been developed to avoid three main types of danger: the danger of things falling on the climber (objective danger), the danger of the climber falling and inclement weather. The things that may fall include rocks, ice, snow, other climbers or their gear; the mountaineer may fall from rocks, ice or snow, or into a crevasse. In all, there are eight chief dangers: falling rocks, falling ice, snow-avalanches, falls, the climber falling, falls from ice slopes, falls down snow slopes, falls into crevasses and dangers from weather. To select and follow a route using one's skills and experience to mitigate these dangers is to exercise the climber's craft.

Falling rocks

Rocky mountains tend to be hazardous.
Rocky mountains tend to be hazardous.

Every rock mountain is slowly disintegrating due to erosion, the process being especially rapid above the snow-line. Rock faces are constantly swept by falling stones, which are generally possible to dodge. Falling rocks tend to form furrows in a mountain face, and these furrows (couloirs) have to be ascended with caution, their sides often being safe when the middle is stoneswept. Rocks fall more frequently on some days than on others, according to the recent weather. Ice formed during the night may temporarily bind rocks to the face but warmth of the day or direct sun exposure may easily dislodge these rocks. Local experience is a valuable help on determining typical rockfall on such routes.

The direction of the dip of rock strata often determines the degree of danger on a particular face; the character of the rock must also be considered. Where stones fall frequently debris will be found below, whilst on snow slopes falling stones cut furrows visible from a great distance. In planning an ascent of a new peak mountaineers must look for such traces. When falling stones get mixed in considerable quantity with slushy snow or water a mud avalanche is formed (common in the Himalaya). It is vital to avoid camping in their possible line of fall.

Falling ice

The places where ice may fall can always be determined beforehand. It falls in the broken parts of glaciers (seracs) and from overhanging cornices formed on the crests of narrow ridges. Large icicles are often formed on steep rock faces, and these fall frequently in fine weather following cold and stormy days. They have to be avoided like falling stones. Seracs are slow in formation, and slow in arriving (by glacier motion) at a condition of unstable equilibrium. They generally fall in or just after the hottest part of the day, and their debris seldom goes far. A skillful and experienced ice-man will usually devise a safe route through a most intricate ice-fall, but such places should be avoided in the afternoon of a hot day. Hanging glaciers (i.e. glaciers perched on steep slopes) often discharge themselves over steep rock-faces, the snout breaking off at intervals. They can always be detected by their debris below. Their track should be avoided.

Falls from rocks

The skill of a rock climber is shown by one's choice of handhold and foothold, and his adhesion to those one has chosen. Much depends on a correct estimate of the firmness of the rock where weight is to be thrown upon it. Many loose rocks are quite firm enough to bear a person's weight, but experience is needed to know which can be trusted, and skill is required in transferring the weight to them without jerking. On rotten rocks the rope must be handled with special care, lest it should start loose stones on to the heads of those below. Similar care must be given to handholds and footholds, for the same reason. When a horizontal traverse has to be made across very difficult rocks, a dangerous situation may arise unless at both ends of the traverse there be firm positions. Mutual assistance on hard rocks takes all manner of forms: two, or even three, people climbing on one another's shoulders, or using an ice axe propped up by others for a foothold. The great principle is that of co-operation, all the members of the party climbing with reference to the others, and not as independent units; each when moving must know what the climber in front and the one behind are doing. After bad weather steep rocks are often found covered with a veneer of ice (verglas), which may even render them inaccessible. Crampons are useful on such occasions.

Avalanches

Main article: Avalanche

The avalanche is the most underestimated danger in the mountains. People generally think that they will be able to recognize the hazards and survive being caught. The truth is a somewhat different story. Every year, 120 - 150 people die in small avalanches in the Alps alone. The vast majority are reasonably experienced male skiers aged 20-35 but also include ski instructors and guides.[citation needed] There is always a lot of pressure to risk a snow crossing. Turning back takes a lot of extra time and effort, supreme leadership, and most importantly there seldom is an avalanche to prove the right decision was made. Making the decision to turn around is especially hard if others are crossing the slope, but any next person could become the trigger.

There are many types of avalanche, but two types are of the most concern:

  1. Slab avalanche
    This type of avalanche occurs when a plate of snow breaks loose and starts sliding down; these are the largest and most dangerous.
    1. Hard slab avalanche
    This type of avalanche is formed by hard-packed snow in a cohesive slab. The slab will not break up easily as it slides down the hill, resulting in large blocks tumbling down the mountain.
    1. Soft slab avalanche
    This type of avalanche is formed again by a cohesive layer of snow bonded together, the slab tends to break up more easily.
  2. Loose snow avalanche
    This type of avalanche is triggered by a small amount of moving snow that accumulates into a big slide. Also known as a "wet slide or point release" avalanche. This type of avalanche is deceptively dangerous as it can still knock a climber or skier off their feet and bury them, or sweep them over a cliff into a terrain trap.

Dangerous slides are most likely to occur on the same slopes preferred by many skiers: long and wide open, few trees or large rocks, 30 to 45 degrees of angle, large load of fresh snow, soon after a big storm, on a slope 'lee to the storm'. Solar radiation can trigger slides as well. These will typically be a point release or wet slough type of avalanche. The added weight of the wet slide can trigger a slab avalanche. Ninety percent of reported victims are caught in avalanches triggered by themselves or others in their group.

When going off-piste or traveling in alpine terrain, parties are advised to always carry:

  1. avalanche beacon
  2. probe
  3. shovel (retrieving victims with a shovel instead of your hands is five times faster)

and to have had avalanche training! Paradoxically, expert skiers who have avalanche training make up a large percentage of avalanche fatalities; perhaps because they are the ones more likely to ski in areas prone to avalanches, and certainly because most people do not practice enough with their equipment to be truly fast and efficient rescuers.

Even with proper rescue equipment and training, there is a one-in-five chance of dying if caught in a significant avalanche, and only a 50/50 chance of being found alive if buried more than a few minutes. The best solution is to learn how to avoid risky conditions.

Ice slopes

Mountaineers descending mixed rock, snow and ice slope in winter High Tatras.
Mountaineers descending mixed rock, snow and ice slope in winter High Tatras.

For travel on slopes consisting of ice or hard snow, crampons are a standard part of a mountaineer's equipment. While step-cutting can sometimes be used on snow slopes of moderate angle, this can be a slow and tiring process, which does not provide the higher security of crampons. However, in soft snow or powder, crampons are easily hampered by balling of snow, which reduces their effectiveness. In either case, an ice axe not only assists with balance but provides the climber with the possibility of self-arrest in case of a slip or fall. On a true ice slope however, an ice axe is rarely able to effect a self-arrest. As an additional safety precaution on steep ice slopes, the climbing rope is attached to ice screws buried into the ice.

True ice slopes are rare in Europe, though common in mountains located in the tropics, where newly-fallen snow quickly thaws on the surface and becomes sodden below, so that the next night's frost turns the whole mass into a sheet of semi-solid ice.

Snow slopes

Part of the Haute Route on French, Swiss border; two alpinists can be seen following the trail in the snow.
Part of the Haute Route on French, Swiss border; two alpinists can be seen following the trail in the snow.

Snow slopes are very common, and usually easy to ascend. At the foot of a snow or ice slope is generally a big crevasse, called a bergschrund, where the final slope of the mountain rises from a snow-field or glacier. Such bergschrunds are generally too wide to be stepped across, and must be crossed by a snow bridge, which needs careful testing and a painstaking use of the rope. A steep snow slope in bad condition may be dangerous, as the whole body of snow may start as an avalanche. Such slopes are less dangerous if ascended directly, rather than obliquely, for an oblique or horizontal track cuts them across and facilitates movement of the mass. New snow lying on ice is especially dangerous. Experience is needed for deciding on the advisability of advancing over snow in doubtful condition. Snow on rocks is usually rotten unless it is thick; snow on snow is likely to be sound. A day or two of fine weather will usually bring new snow into sound condition. Snow cannot lie at a very steep angle, though it often deceives the eye as to its slope. Snow slopes seldom exceed 40°. Ice slopes may be much steeper. Snow slopes in early morning are usually hard and safe, but the same in the afternoon are quite soft and possibly dangerous; hence the advantage of an early start.

Crevasses

Crevasses are the slits or deep chasms formed in the substance of a glacier as it passes over an uneven bed. They may be open or hidden. In the lower part of a glacier the crevasses are open. Above the snow-line they are frequently hidden by arched-over accumulations of winter snow. The detection of hidden crevasses requires care and experience. After a fresh fall of snow they can only be detected by sounding with the pole of the ice axe, or by looking to right and left where the open extension of a partially hidden crevasse may be obvious. The safeguard against accident is the rope, and no one should ever cross a snow-covered glacier unless roped to one, or even better to two companions. Anyone venturing onto crevasses should be trained in crevasse rescue.

Weather

The primary dangers caused by bad weather centre around the changes it causes in snow and rock conditions, making movement suddenly much more arduous and hazardous than under normal circumstances.

Poor visibility in blizzard conditions.
Poor visibility in blizzard conditions.

Whiteouts make it difficult to retrace a route while rain may prevent taking the easiest line only determined as such under dry conditions. In a storm the mountaineer who uses a compass for guidance has a great advantage over a merely empirical observer. In large snow-fields it is, of course, easier to go wrong than on rocks, but intelligence and experience are the best guides in safely navigating objective hazards.

Summer thunderstorms may produce intense lightning. If a climber happens to be standing on or near the summit, they risk being struck. There are many cases where people have been struck by lightning while climbing mountains. In most mountainous regions, local storms develop by late morning and early afternoon. Many climbers will get an "alpine start"; that is before or by first light so as to be on the way down when storms are intensifying in activity and lightning and other weather hazards are a distinct threat to safety.

Altitude

Rapid ascent can lead to altitude sickness. The best treatment is to descend immediately. The climber's motto at high altitude is "climb high, sleep low", referring to the regimen of climbing higher to acclimatize but returning to lower elevation to sleep. In the South American Andes, the chewing of coca leaves has been traditionally used to treat altitude sickness symptoms.

Common symptoms of altitude sickness include severe headache, sleep problems, nausea, lack of appetite, lethargy and body ache. Mountain sickness may progress to HACE (High Altitude Cerebral Edema) and HAPE (High Altitude Pulmonary Edema), both of which can be fatal within 24 hours.

In high mountains, atmospheric pressure is lower and this means that less oxygen is available to breathe. This is the underlying cause of altitude sickness. Everyone needs to acclimatize, even exceptional mountaineers that have been to high altitude before. Generally speaking, mountaineers start using bottled oxygen when they climb above 7,000 m. Exceptional mountaineers have climbed 8000-metre peaks (including Everest) without oxygen, almost always with a carefully planned program of acclimatization.

In 2005, researcher and mountaineer John Semple established that above-average ozone concentrations on the Tibetan plateau may pose an additional risk to climbers.[1]

Locations

Mountaineering has become a popular sport throughout the world. In Europe the sport largely originated in the Alps, and is still immensely popular there. Other notable mountain ranges frequented by climbers include the Caucasus, the Pyrenees, Rila Mountain and the Tatra mountains. In North America climbers frequent the Rockies and Sierra Nevada of California, the Cascades of Washington and the high peaks of Alaska. There has been a long tradition of climbers going on expeditions to the Greater Ranges, a term generally used for the Andes and the high peaks of Asia including the Himalaya, Pamirs and Tien Shan. In the past this was often on exploratory trips or to make first ascents. With the advent of cheaper long-haul air travel mountaineering holidays in the Greater Ranges are now undertaken much more frequently and ascents of even Everest and Vinson Massif (the highest mountain in Antarctica) are offered as a "package holiday". Other popular mountaineering areas of more local interest include the Southern Alps of New Zealand, the Japanese Alps the Scottish Highlands and the mountains of Scandinavia, especially Norway.

History

  • Though it is unknown whether his intention was to reach a summit, Ötzi ascended at least 3,000 m in the Alps about 5,300 years ago. His remains were found at that altitude, preserved in a glacier.
  • The first recorded mountain ascent in the Common Era is Roman Emperor Hadrian's ascent of Etna (3,350 m) to see the sun rise in 121.
  • Peter III of Aragon climbed Canigou in the Pyrenees in the last quarter of the 13th century.
  • The first ascent of the Popocatépetl (5,426 m in Mexico) was reported in 1289 by members of a local tribe (Tecanuapas)
  • Jean Buridan climbed Mont Ventoux around 1316.[2]
  • The Italian poet Petrarch wrote that on April 26, 1336 he, together with his brother and two servants, climbed to the top of Mont Ventoux (1,909 m). His account of the trip was composed later as a letter to his friend Dionigi di Borgo San Sepolcro.[3]
  • The Rochemelon (3,538 m) in the Italian Alps was climbed in 1358.
  • In the late 1400s and early 1500s ascents were made of numerous high peaks in the Andes, for religious purposes by the citizens of the Inca Empire and their subjects. They constructed platforms, houses and altars on many summits and carried out sacrifices, including human sacrifices. The highest peak they are known for certain to have climbed is Llullaillaco (6,739 m). They may also have ascended the highest peak in the Andes, Aconcagua (6,962 m) as a sacrifice victim has been found at over 5,000 m on this peak.[citation needed]
  • In 1492 the ascent of Mont Aiguille was made by order of Charles VIII of France. The Humanists of the 16th century adopted a new attitude towards mountains, but the disturbed state of Europe nipped in the bud the nascent mountaineering of the Zurich school.
  • Leonardo da Vinci climbed to a snow-field in the neighborhood of the Val Sesia and made scientific observations.
  • In 1642 Darby Field made the first recorded ascent of Mount Washington, then known as Agiocochook, in New Hampshire.
  • Konrad Gesner and Josias Simler of Zurich visited and described mountains, and made regular ascents. The use of ice axe and rope were locally invented at this time. No mountain expeditions of note are recorded in the 17th century.
  • Richard Pococke and William Windham's historic visit to Chamonix was made in 1741, and set the trend for visiting glaciers.
  • In 1744 the Titus was climbed, the first true ascent of a snow-mountain.
  • The first attempt to ascend Mont Blanc was made in 1775 by a party of natives. In 1786 Dr Michel Paccard and Jacques Balmat gained the summit for the first time. Horace-Bénédict de Saussure, the initiator of the first ascent followed next year.
  • The Norwegian mountain climber, Jens Esmark was the first person to ascend Snøhetta in 1798, part of the Dovrefjell range in Southern Norway. The same year he lead the first expedition to Bitihorn, a small mountain in the southernmost outskirts of Jotunheimen, Norway. In 1810 he was the first person to ascend Mount Gaustatoppen in Telemark, Norway.
  • The Grossglockner was climbed in 1800, the Ortler in 1804, the Jungfrau in 1811, the Finsteraarhorn in 1812, and the Breithorn in 1813. Thereafter, tourists showed a tendency to climb, and the body of Alpine guides began to come into existence as a consequence.
  • Citlaltépetl (5720 m in Mexico) was first climbed in 1848 by F. Maynard & G. Reynolds.
  • Systematic mountaineering, as a sport, is usually dated from Sir Alfred Wills's ascent of the Wetterhorn in 1854. The first ascent of Monte Rosa was made in 1855.
  • The Alpine Club was founded in London in 1857, and was soon imitated in most European countries. Edward Whymper's ascent of the Matterhorn in 1865 marked the close of the main period of Alpine conquest – the Golden age of alpinism – during which the craft of climbing was invented and 'perfected', the body of professional guides formed and their traditions fixed.
  • Passing to other ranges, the exploration of the Pyrenees was concurrent with that of the Alps. The Caucasus followed, mainly owing to the initiative of D. W. Freshfield; it was first visited by exploring climbers in 1868, and most of its great peaks were climbed by 1888.
  • The Edelweiss Club Salzburg was founded in Salzburg in 1881, and had 3 members make the first ascent on two Eight-thousanders, Broad Peak (1957) and Dhaulagiri (1960).
  • Trained climbers turned their attention to the mountains of North America in 1888, when the Rev. W. S. Green made an expedition to the Selkirk Mountains. From that time exploration has gone on apace, and many English and American climbing parties have surveyed most of the highest peaks; Pikes Peak (14,115 ft) having been climbed by Mr. E. James and party in 1820, and Mt. Saint Elias (18,008 ft) by the Duke of the Abruzzi and party in 1897. The exploration of the highest Andes was begun in 1879-1880, when Whymper climbed Chimborazo and explored the mountains of Ecuador. The Cordillera between Chile and Argentina was visited by Dr. Gussfeldt in 1883, who ascended Maipo (17,270 ft) and attempted Aconcagua (22,841 ft). That peak was first climbed by the Fitzgerald expedition in 1897.
  • The Andes of Bolivia were first explored by Sir William Martin Conway in 1898. Chilean and Argentine expeditions revealed the structure of the southern Cordillera in the years 1885-1898. Conway visited the mountains of Tierra del Fuego.
  • New Zealand's Southern Alps were first visited in 1882 by the Rev. W. S. Green, and shortly afterwards a New Zealand Alpine Club was founded, and by their activities the exploration of the range was pushed forward. In 1895, Major Edward Arthur Fitzgerald, made an important journey in this range. Tom Fyfe and party climbed Aoraki/Mount Cook on Christmas Day 1894, denying Fitzgerald the first ascent. Fitzgerald was en route from Britain with Swiss guide Matthias Zurbriggen to claim the peak. So piqued at being beaten to the top of Mount Cook, he refused to climb it and concentrated on other peaks in the area. Later in the trip Zubriggen soloed Mount Cook up a ridge that now bears his name.
  • The first mountains of the arctic region explored were those of Spitsbergen by Sir W. M. Conway's expeditions in 1896 and 1897.
  • Of the high African peaks, Kilimanjaro was climbed in 1889 by Dr. Hans Meyer, Mt. Kenya in 1899 by Halford John Mackinder[4], and a peak of Ruwenzori by H. J. Moore in 1900.
  • The Asiatic mountains were initially surveyed on orders of the British Empire. In 1892 Sir William Martin Conway explored the Karakoram Himalaya, and climbed a peak of 23,000 ft (7,000 m) In 1895 Albert F. Mummery died while attempting Nanga Parbat, while in 1899 D. W. Freshfield took an expedition to the snowy regions of Sikkim. In 1899, 1903, 1906 and 1908 Mrs Fannie Bullock Workman made ascents in the Himalayas, including one of the Nun Kun peaks (23,300 ft). A number of Gurkha sepoys were trained as expert mountaineers by Major the Hon. C. G. Bruce, and a good deal of exploration was accomplished by them.
  • The Rucksack Club was founded in Manchester, England in 1902.
  • The American Alpine Club was founded in 1902.
  • In 1902, the Eckenstein-Crowley Expedition, lead by mountaineer Oscar Eckenstein and occultist Aleister Crowley, was the first to attempt to scale Chogo Ri (now known as K2 in the west). They reached 22,000 feet (6,700 m) before turning back due to weather and other mishaps.
  • In 1905, Aleister Crowley led the first expedition to Kanchenjunga, the third highest mountain in the world. Four members of that party were killed in an avalanche. Some claims say they reached around 21,300 feet (6,500 m) before turning back, however Crowley's autobiography claims they reached about 25,000 feet (7,600 m).
  • The 1950s saw the first ascents of all the eight-thousanders but two, starting with Annapurna in 1950 by Maurice Herzog and Louis Lachenal. The world's highest mountain (above mean sea level), Mount Everest (8,848 m) was first climbed on May 29, 1953 by Sir Edmund Hillary and Tenzing Norgay from the south side in Nepal. Just a few months later, Hermann Buhl made the first ascent of Nanga Parbat (8,125 m), a siege style expedition culminating in a remarkable solo push for the summit, it's the only eight-thousander to be summited solo on the first ascent. K2 (8,611 m), the second highest peak in the world was first scaled in 1954. In 1964, the final eight-thousander to be climbed was Shishapangma (8,013 m), the lowest of all the 8,000 metre peaks.

Celestial navigation

Celestial navigation

From Wikipedia, the free encyclopedia

Celestial navigation, also known as astronavigation, is a position fixing technique that was devised to help sailors cross the featureless oceans without having to rely on dead reckoning to enable them to strike land. Celestial navigation uses angular measurements (sights) between the horizon and a common celestial object. The Sun is most often measured. Skilled navigators can use the Moon, planets or one of 57 "navigational stars" whose coordinates are tabulated in nautical almanacs.

How it works

Celestial navigation is the process whereby angles between objects in the sky (celestial objects) and the horizon are used to locate one's position on the globe. At any given instant of time, any celestial object (e.g. the Moon, Jupiter, navigational star Spica) will be located directly over a particular geographic position on the Earth. This geographic position is known as the celestial object’s subpoint, and its location (e.g. its latitude and longitude) can be determined by referring to tables in a nautical or air almanac.

The measured angle between the celestial object and the horizon is directly related to the angle between the subpoint and the observer, and this measurement is used to define a circle on the surface of the Earth called a celestial line of position (LOP). The size and location of this circular line of position can be determined using mathematical or graphical methods (discussed below). The LOP is significant because the celestial object would be observed to be at the same angle above the horizon from any point along its circumference at that instant.

An example illustrating the concept behind the intercept method for determining one’s position is shown in the Figure below. (Two other common methods for determining one’s position using celestial navigation are the longitude by chronometer and ex-meridian methods.) In the image below, the two circles on the map represent lines of position for the Sun and Moon at 1200 GMT on October 29, 2005. At this time, a navigator on a ship at sea measured the Moon to be 56 degrees above the horizon using a sextant. Ten minutes later, the Sun was observed to be 40 degrees above the horizon. Lines of position were then calculated and plotted for each of these observations. Since both the Sun and Moon were observed at their respective angles from the same location, the navigator would have to be located at one of the two locations where the circles cross.

In this case the navigator is either located on the Atlantic Ocean, about 350 nautical miles (650 km) west of Madeira, or in South America, about 90 nautical miles (170 km) southwest of Asunción, Paraguay. In most cases, determining which of the two intersections is the correct one is obvious to the observer because they are often thousands of miles apart. As it is unlikely that the ship is sailing across the Pampas, the position in the Atlantic is the correct one. Note that the lines of position in the figure are distorted because of the map’s projection; they would be circular if plotted on a globe.

Image:Sun Moon (annotated).gif

Angular measurement

Using a marine sextant to measure the altitude of the sun above the horizon
Using a marine sextant to measure the altitude of the sun above the horizon

Accurate angle measurement evolved over the years. One simple method is to hold the hand above the horizon with your arm stretched out. The width of a finger is an angle just over 1.5 degrees. The need for more accurate measurements led to the development of a number of increasingly accurate instruments, including the kamal, astrolabe, octant and sextant. The sextant and octant are most accurate because they measure angles from the horizon, eliminating errors caused by the placement of an instrument's pointers, and because their dual mirror system cancels relative motions of the instrument, showing a steady view of the object and horizon.

Navigators measure distance on the globe in degrees, arcminutes and arcseconds. A nautical mile is defined as 1852 meters, but is also (not accidentally) one minute of angle along a meridian on the Earth. Sextants can be read accurately to within 0.2 arcminutes. So the observer's position can be determined within (theoretically) 0.2 miles, about 400 yards (370 m). Most ocean navigators, shooting from a moving platform, can achieve a practical accuracy of 1.5 miles (2.8 km), enough to navigate safely when out of sight of land.

Practical navigation

Practical celestial navigation usually requires a marine chronometer to measure time, a sextant to measure the angles, an almanac giving schedules of the coordinates of celestial objects, a set of sight reduction tables to help perform the height and azimuth computations, and a chart of the region. With sight reduction tables, the only math required is addition and subtraction. Small handheld computers, laptops and even scientific calculators enable modern navigators to "reduce" sextant sights in minutes, by automating all the calculation and/or data lookup steps. Most people can master simpler celestial navigation procedures after a day or two of instruction and practice, even using manual calculation methods.

Modern practical navigators usually use celestial navigation in combination with satellite navigation to correct a dead reckoning track, that is, a course estimated from a vessel's position, angle and speed. Using multiple methods helps the navigator detect errors, and simplifies procedures. When used this way, a navigator will from time to time measure the sun's altitude with a sextant, then compare that with a precalculated altitude based on the exact time and estimated position of the observation. On the chart, one will use the straight edge of a plotter to mark each position line. If the position line shows one to be more than a few miles from the estimated position, one may take more observations to restart the dead-reckoning track.

In the event of equipment or electrical failure, one can get to a port by simply taking sun lines a few times a day and advancing them by dead reckoning to get a crude running fix.

Latitude

Latitude was measured in the past either at noon (the "noon sight") or from Polaris, the north star. Polaris always stays within 1 degree of celestial north pole. If a navigator measures the angle to Polaris and finds it to be 10 degrees from the horizon, then he is on a circle at about North 10 degrees of geographic latitude. Angles are measured from the horizon because locating the point directly overhead, the zenith, is difficult. When haze obscures the horizon, navigators use artificial horizons, which are bubble levels reflected into a sextant.

Latitude can also be determined by the direction in which the stars travel over time. If the stars rise out of the east and travel straight up you are at the equator, but if they drift south you are to the north of the equator. The same is true of the day-to-day drift of the stars due to the movement of the Earth in orbit around the Sun; each day a star will drift approximately one degree. In either case if the drift can be measured accurately, simple trigonometry will reveal the latitude.

Longitude

Longitude can be measured in the same way. If one can accurately measure the angle to Polaris, a similar measurement to a star near the eastern or western horizons will provide the longitude. The problem is that the Earth turns about 15 degrees per hour, making such measurements dependent on time. A measure only a few minutes before or after the same measure the day before creates serious navigation errors. Before good chronometers were available, longitude measurements were based on the transit of the moon, or the positions of the moons of Jupiter. For the most part, these were too difficult to be used by anyone except professional astronomers.

The longitude problem took centuries to solve. Two useful methods evolved during the 1700s, and are still practiced today: lunar distance, which does not involve the use of a chronometer, and use of an accurate timepiece, or chronometer.

Lunar distance

Main article: Lunar distance

The older method, called "lunar distances", was refined in the 18th century. It is only used today by sextant hobbyists and historians, but the method is sound, and can be used when a timepiece is not available or its accuracy is suspect during a long sea voyage. The navigator precisely measures the angle between the moon and a body like the sun or a selected group of stars lying along the ecliptic. That angle, after it is corrected for various errors, is the same at any place on the surface of the earth facing the moon at a unique instant of time. Old almanacs used to list angles in tables. The navigator could thumb through the almanac to find the angle he or she measured, and thus know the time at Greenwich. Modern handheld and laptop calculators can perform the calculation in minutes, allowing the navigator to use other acceptable celestial bodies than the old nine. Knowing Greenwich time, the navigator can work out longitude.

Use of time

The considerably more popular method was (and still is) to use an accurate timepiece to directly measure the time of a sextant sight. The need for accurate navigation led to the development of progressively more accurate chronometers in the 18th century. Today, time is measured with a chronometer, a quartz watch, a shortwave radio time signal broadcast from an atomic clock, or the time displayed on a GPS. A quartz wristwatch normally keeps time within a half-second per day. If it is worn constantly, keeping it near body heat, its rate of drift can be measured with the radio, and by compensating for this drift, a navigator can keep time to better than a second per month. Traditionally, a navigator checked his chronometer from his sextant, at a geographic marker surveyed by a professional astronomer. This is now a rare skill, and most harbor masters cannot locate their harbor's marker.

Traditionally, three chronometers were kept in gimbals in a dry room near the center of the ship. They were used to set a watch for the actual sight, so that no chronometers were ever risked to the wind and salt water on deck. Winding the chronometers was a crucial duty of the navigator, logged as "chron. wound." for checking by line officers. Navigators also set the ship's clocks and calendar.

Modern celestial navigation

The celestial line of position concept was discovered in 1837 by Thomas Hubbard Sumner when, after one observation he computed and plotted his longitude at more than one trial latitude in his vicinity--and noticed that the positions lay along a line. Using this method with two bodies, navigators were finally able cross two position lines and obtain their position--in effect determining both latitude and longitude. Later in the 19th century came the development of the modern (Marcq St. Hilaire) intercept method; with this method the body height and azimuth are calculated for a convenient trial position, and compared with the observed height. The difference in arcminutes is the nautical mile "intercept" distance that the position line needs to be shifted toward or away from the direction of the body's subpoint. (The intercept method uses the concept illustrated in the example in the “How It Works” section above.) Two other methods of reducing sights are the longitude by chronometer and the ex-meridian method.

While celestial navigation is becoming increasingly redundant with the advent of inexpensive and highly accurate satellite navigation receivers (GPS), it was used extensively in aviation until 1960s, and marine navigation until quite recently. But since a prudent mariner never relies on any sole means of fixing his/her position, many national maritime authorities still require deck officers to show knowledge of celestial navigation in examinations, primarily as a back up for electronic navigation. One of the most common current usages of celestial navigation aboard large merchant vessels is for compass calibration and error checking at sea when no terrestrial references are available.

The U.S. Air Force and U.S. Navy continued instructing military aviators on its use until 1997, because:

  • it can be used independently of ground aids
  • has global coverage
  • cannot be jammed (except by clouds)
  • does not give off any signals that could be detected by an enemy[1]

The US Naval Academy announced that it was discontinuing its course on celestial navigation, considered to be one of its most demanding courses, from the formal curriculum in the spring of 1998 stating that a Sextant is accurate to a three-mile (5 km) radius, while a satellite-linked computer can pinpoint a ship within 60 feet (18 m). Presently, midshipmen continue to learn to use the sextant, but instead of performing a tedious 22-step mathematical calculation to plot a ship's course, midshipmen feed the raw data into a computer.[2]

Likewise, celestial navigation was used in commercial aviation up until the early part of the jet age; it was only phased out in the 1960s with the advent of inertial navigation systems.

Celestial Navigation continues to be taught to cadets during their training in the British Merchant Navy and remains as a requirement for their certificate of competency.

A variation on terrestrial celestial navigation was used to help orient the Apollo spacecraft enroute to and from the Moon. To this day, space missions, such as the Mars Exploration Rover use star trackers to determine the attitude of the spacecraft.

As early as the mid-1960s, advanced electronic and computer systems had evolved enabling navigators to obtain automated celestial sight fixes. These systems were used aboard both ships as well as US Air Force aircraft, and were highly accurate, able to lock onto up to 11 stars (even in daytime) and resolve the craft's position to less than 300 feet (91 m). The SR-71 high-speed reconnaissance aircraft was one example of an aircraft that used automated celestial navigation. These rare systems were expensive, however, and the few that remain in use today are regarded as backups to more reliable satellite positioning systems.

Celestial navigation continues to be used by private yachtsmen, and particularly by long-distance cruising yachts around the world. For small cruising boat crews, celestial navigation is generally considered an essential skill when venturing beyond visual range of land. Although GPS (Global Positioning System) technology is reliable, offshore yachtsmen use celestial navigation as either a primary navigational tool or as a backup.

Celestial Navigation Trainer

The Link Celestial Navigation Trainer of the Second World War was an early Celestial Navigation Trainer.

Housed in a 45 feet (14 m) high building it featured a cockpit which accommodated a whole bomber crew (pilot, navigator and bomber). The cockpit offered a full array of instruments which the pilot used to fly the simulated aeroplane. Fixed to a dome above the cockpit was an arrangement of lights, some collimated, simulating constellations from which the navigator determined the plane's position. The dome's movement simulated the changing positions of the stars with the passage of time and the movement of the plane around the earth. The navigator also received simulated radio signals from various positions on the ground.

Below the cockpit moved "terrain plates"--large, movable aerial photographs of the land below, which gave the crew the impression of flight and enabled the bomber to practise lining up bombing targets.

A team of operators sat at a control booth on the ground below the machine, from which they could simulate weather conditions such as wind or cloud. This team also tracked the aeroplane's position by moving a "crab" (a marker) on a paper map.

The Link Celestial Navigation Trainer was developed in response to a request made by the British Royal Air Force (RAF) in 1939. The RAF ordered 60 of these machines, and the first one was built in 1941. The RAF used only a few of these, leasing the rest back to the U.S., where hundreds of Link Celestial Navigation Trainers were in use.

Survivalism

Survivalism

From Wikipedia, the free encyclopedia


Survivalism is a commonly used (and often mis-used) term for the preparedness strategy and subculture of individuals or groups anticipating and making preparations for future possible disruptions in local, regional or worldwide social or political order. Survivalists often prepare for this anticipated disruption by learning skills (e.g., emergency medical training), stockpiling food and water, preparing for self-defense and self-sufficiency, and/or building structures that will help them to survive or "disappear" (e.g., a survival retreat or underground shelter).

The specific preparations made by survivalists depends on the nature of the anticipated disruption(s), some of the most common scenarios being:

  1. Natural disaster clusters, and patterns of apocalyptic planetary crises or Earth changes, such as Climate Change bringing on tornadoes, hurricanes, earthquakes, blizzards, and severe thunderstorms, etc.
  2. A disaster brought about by the activities of mankind: chemical spills, release of radioactive materials, war, or an oppressive government.
  3. General collapse of society, resulting from the unavailability of electricity, fuel, food, and water.
  4. Monetary disruption or Economic collapse, stemming from monetary manipulation, hyper-inflation or world-wide depression.
  5. Widespread chaos, or some other unexplained apocalyptic event.

The roots of the modern survivalist movement in the United States and Britain can be traced to several sources, including government policies, threats of nuclear warfare, religious beliefs, writers warning of social or economic collapse, apocalyptic and post-apocalyptic fiction and climate change.

A Duck & Cover movie poster
A Duck & Cover movie poster
A copy of Survival Under Atomic Attack, a Civil Defense publication.
A copy of Survival Under Atomic Attack, a Civil Defense publication.

The Cold War era government Civil Defense programs promoted public atomic bomb shelters, personal fallout shelter, and training for children, such as the Duck and Cover films. The Church of Jesus Christ of Latter-day Saints has long directed its members to store a year's worth of food for themselves and their families in preparation for such possibilities.[1] Also, the Scout movement lives by the motto: "Be Prepared!"

1960s

With the increasing inflation of the 1960s and the impending US monetary Devaluation (predicted by Harry Browne in his 1970 book How You Can Profit from the Coming Devaluation), as well as the continuing concern with possible nuclear exchanges between the US and the Soviet Union, and the increasing vulnerability of urban centers to supply shortages and other systems failures, a number of primarily conservative and Libertarian thinkers began suggesting that individual preparations would be wise. Mr. Browne began offering seminars on how to survive a monetary collapse in 1967, with Don Stephens, an architectural design innovator, providing input on how to build and equip a remote Survival retreat and providing a copy of his original Retreater's Bibliography for each seminar participant.

Articles on the subject appeared in such small-distribution Libertarian publications as The Innovator and Atlantis Quarterly. It was also from this period that Robert D. Kephart began publishing Inflation Survival Letter [2](later renamed Personal Finance). The newsletter included a continuing section on personal preparedness by Stephens for several years. It promoted high-ticket seminars around the US on the same cautionary topics, in which Stephens participated, along with James McKeever and other defensive investing, "hard money" advocates.

1970s

In the next decade Howard Ruff also warned about socio-economic collapse in his 1974 book Famine and Survival in America. Ruff's book was published during a period of rampant inflation in the wake of the 1973 oil crisis. Most of the elements of survivalism can be found there, including advice on storage of food. The book also championed the point that precious metals, such as gold (as in South African Krugerrands) and silver, have an intrinsic worth that makes them more usable in the event of a socioeconomic collapse than fiat currency. Ruff later published milder variations on the same themes, such as How to Prosper During the Coming Bad Years, a best-seller in 1979.

Newsletters and books on the topic of survival followed the publication of Ruff's first book. In 1975, Kurt Saxon began publishing a newsletter called The Survivor, which combined Saxon's editorials with reprints of old 19th century and early 20th century writings on various pioneer skills and old technologies. Kurt Saxon used the term "survivalist" to describe the movement, and he claims to have coined the term.[3]

In the previous decade, preparedness consultant, survival bookseller and author Don Stephens from California, had popularized the term "retreater" to describe those in the movement, referring to preparations to leave the cities for a remote place of haven or survival retreat when/if society breaks down. In 1976, before moving north himself, he and his wife authored and published The Survivor's Primer & Up-dated Retreater's Bibliography, followed by a range of other supportive materials.

For a time in the 1970s, the terms "survivalist" and "retreater" were used interchangeably. While the term "retreater" eventually "fell below the public radar", many who ascribed to it saw "retreating" as the more rational, conflict-avoidance, remote "invisibility" approach. "Survivalism", on the other hand, tended to take on a more media-sensationalized, combative, "shoot-it-out-with-the-looters (and perhaps "Walter-Mitty-ish) image. [4]

Another important newsletter in the 1970s was the Personal Survival Letter published by Mel Tappan, who also authored the books Survival Guns and Tappan on Survival. These newsletters functioned as important networking tools for the movement before the information age.

In addition to hard copy newsletters, in the 1970s survivalists got their first online presence with BBS[5] and Usenet forums dedicated to survivalism and survival retreats.

1980s

Interest in the first wave of the survivalist movement peaked in the early 1980s, on the momentum of Ruff's How to Prosper During the Coming Bad Years and the publication in 1980 of the book Life After Doomsday by Bruce D. Clayton. Clayton's book, coinciding with a renewed arms race between the United States and Soviet Union, marked a shift in emphasis in preparations made by survivalists away from economic collapse, famine, and energy shortages which were concerns in the 1970s, to nuclear war. Also in the early 1980s, science fiction writer Jerry Pournelle was an editor and columnist for Survive, a survivalist magazine, and he was considered influential in the survivalist movement.[6] Ragnar Benson's 1982 book Live Off The Land In The City And Country suggested rural survival retreats as both a preparedness measure and as a conscious change of lifestyle.

1990s-present

Interest in the movement peaked again in 1999 in its second wave, triggered by fears of the Y2K computer bug. Although extensive efforts were made to rewrite computer programming code in response, some people nonetheless anticipated widespread power outages, food and gasoline shortages, and other emergencies to occur. While a range of authors responded to this wave of concern, perhaps one of the most survival-focused offerings was The Hippy Survival Guide to Y2K by Mike Oehler, an Underground living advocate, who also authored The $50 and Up Underground House Book.


The third and most recent wave of the Survivalist movement began after the terrorist attacks on the World Trade Center in New York in 2001 and similar attacks in Bali, Spain, and London. This resurgence of interest in survivalism appears to be as strong as the first wave in the 1970s. The fear of a war or jihad against the West, combined with an increase in awareness of environmental disasters and global climate change, energy shortages resulting from peak oil, coupled with the vulnerability of humanity after the 2004 tsunami in the Indian Ocean and Hurricane Katrina on the U.S. Gulf Coast and avian influenza has once again made survivalism popular. Preparedness is once more paramount in the concerns of many people, who now seek to stockpile or cache supplies, gain useful skills, develop contacts with others of similar outlooks and gather as much advice and information as possible.

Many books have been published in the past few years offering survival advice for various potential disasters, ranging from an energy shortage and crash to nuclear or biological terrorism. In addition to reading the 1970s-era books on survivalism, blogs (such as SurvivalBlog) and Internet forums are popular ways of disseminating survivalism information. Online survival websites discuss survival vehicles, survival retreats and emerging threats, and list survivalist groups.[7]

Common preparations

Common preparations sometimes include preparing a clandestine or defensible 'retreat' or 'safe place' (Bug Out Location or BOL) and stockpiling non-perishable food, water, water-purification equipment, clothing, seed, defensive weapons, ammunition, and agricultural equipment. Some survivalists do not make such extensive preparations but instead incorporate a "Be Prepared" outlook into their everyday life.

Many survivalists also have a bag of gear that is often referred to as a Bug Out Bag (BOB), holding basic necessities and useful items weighing anywhere up to as much as the owner can carry.

Survivalists aim to remain self-sufficient for the duration of the breakdown of social order, or perhaps indefinitely if the breakdown is predicted to be permanent (a "Third Dark Age"), a possibility popularized in the 1960s by Roberto Vacca of the Club of Rome. Survivalists allow for the contingency that they cannot prevent this breakdown, and prepare to survive in small communal groups ("group retreats") or "covenant communities."

Changing concerns and preparations

Survivalists' concerns and preparations have changed over the years. During the 1970s, survivalists feared economic collapse, hyperinflation, and famine, and prepared by storing food and constructing survival retreats in the country which could be farmed. Some survivalists stockpiled precious metals and barterable goods (such as common caliber ammunition) because they assumed that paper currency would become worthless. During the early 1980s, nuclear war became a common fear, and some survivalists constructed fallout shelters.

In 1999, many people purchased electric generators, water purifiers, and several months or years worth of food in anticipation of widespread power outages because of the Y2K computer-bug. Instead of moving or making such preparations at home, many people also make plans to remain in their current locations until an actual breakdown occurs, when they will-in survivalist parlance- "bug out" or "get out of Dodge" to a safer location.

Religious beliefs

Other survivalists have more specialized concerns, often related to an adherence to apocalyptic religious beliefs. Some New Agers anticipate a forthcoming arrival of catastrophic earth changes and prepare to survive them. Some evangelical Christians hold to an interpretation of Bible prophecy known as a post-tribulation rapture, in which Christians will have to go through a seven-year period of war and global dictatorship known as the "Great Tribulation." Jim McKeever helped popularize survival preparations among this branch of evangelical Christians with his 1978 book Christians Will Go Through the Tribulation, and How To Prepare For It (ISBN 0-931608-02-3).

The Church of Jesus Christ of Latter-day Saints has an official policy of food storage for its members. This is more of a precaution for emergencies rather than in preparation for some apocalyptic event. Some very small religious sects have also been known for their belief in a coming apocalypse and the adoption of some survivalist practices. Among the best known of these groups are the Branch Davidians, an offshoot of the Seventh-day Adventist Church.

Mainstream emergency preparations

People who are not part of survivalist groups or apocalyptic-oriented religious groups also make preparations for emergencies. This can include, depending on the location, preparing for earthquakes, floods, power outages, blizzards, avalanches, wildfires, nuclear power plant accidents, hazardous material spills, tornadoes, and hurricanes. These preparations can be as simple as following Red Cross and FEMA recommendations by keeping a first aid kit, shovel, and extra clothes in the car, or maintaining a small kit of emergency supplies in the home and car, containing emergency food, water, a space blanket and other essentials.

Extremist groups

Some survivalists take a militaristic approach and have a strong concern about government involvement in their affairs. This is most common (though still rare compared to the total population) in rural parts of the Western United States, where a world view occasionally develops that growing interference from the federal government and the United Nations (perceived to be, or to be aiming for, a world government), is best countered through distancing oneself from society, adopting a survivalist stance, and the acquisition of suitable small arms. However, not all who take military matters into their own hands are survivalists.

Kurt Saxon, who besides publishing a survival newsletter is also the author of a book on improvised weapons, The Poor Man's James Bond, is perhaps the best known proponent of this approach to survivalism. Saxon's writings on survival tend toward social Darwinism, with survivalism defined by Saxon as "Looking out for #1" and a need to be sufficiently armed to defend one's refuge and belongings from hungry people who might demand that others share them if society breaks down.

Such a militaristic approach is not shared by many survivalists, and is indeed condemned by many survivalists. Nevertheless, its prominence in popular depictions results in the term "survivalism" being sometimes used interchangeably with right-wing reactionarism. In particular, the mainstream media tends to label militants and miscellaneous extremists as "survivalists".

Government preparedness efforts and training

Some governments have encouraged citizens to prepare for emergency situations, including a situation which would result in breakdown of the infrastructure. An earlier civil defense effort in the United States during the 1950s and 1960s fell into disrepair by the 1970s. These included the designation of structures as official fallout shelters, and duck and cover drills in schools. A booklet released by the office of the Executive Office of the President of the United States shortly after the start of the cold war called Survival Under Atomic Attack depicts the nature of the early civil defense initiatives.

The U.S. government civil defense program was minimal during the 1970s, 1980s, and 1990s, despite efforts by a few including Christian Dominionist writer Gary North to lobby the government to resume civil defense efforts and build fallout shelters. Gary North co-wrote a book, Fighting Chance to advocate for the return of the civil defense program. A renewal of U.S. government interest in preparedness and training did not happen until after the September 11th attacks and Hurricane Katrina. See: Community Emergency Response Team (CERT).

Official government preparedness training has often been ridiculed or discounted by those in the survivalist movement. This goes in particular for the 1950s/1960s era duck and cover drills. One main tenet of the survivalist movement has been that people should prepare on their own or with like-minded people, not rely on the government to take care of them in emergencies. On the other hand, there is a growing body of thought in favor of community based efforts, widespread involvement in CERTs, and working together with first responders. Many of those in favor of this approach reject the term "survivalist" [8] because they see preparing in conjunction with government agencies, and preparing completely apart from the government, as two separate things; also because they emphasize that they do not anticipate any permanent or long-term breakdown of society which they say survivalists do.

Survivalism worldwide

Survivalist groups, both formal and informal are popular worldwide, most visibly in Australia, [9], Canada[10], France[11], Sweden[12],New Zealand and The United States[13].

Other groups related to survivalism

Adherents of the back-to-the-land movement, which has been sporadically popular in the United States, especially in the 1930s inspired by Helen and Scott Nearing, and more recently in the 1970s, as exemplified by The Mother Earth News magazine, share many of the same interests in self-sufficiency and preparedness with survivalists. They differ from most survivalists in that they have a greater interest in ecology, and sometimes the counterculture, than most survivalists do. The Mother Earth News was, as a result, widely read by survivalists as well as back-to-the-landers during that magazine's early years, and there was some overlap between the two movements.

Ernest Callenbach's 1975 novel Ecotopia, about the secession of the Pacific Northwest from the United States to form a new country based on environmentalism, named the political party governing the new country the Survivalist Party. However in his 1981 sequel to the book, Ecotopia Emerging, he qualified that choice of name by having the party leader state that the name Survivalist referred to the survival of the planet's ecosystems, not to people who prepare for an economic or political collapse.

In fiction

Novels

Earth Abides by George R. Stewart (1949), deals with one man who finds most of civilization has been destroyed by a plague. Slowly a small community forms around him as he struggles to start a new civilization and preserve knowledge and learning.

John Wyndham's 1951 novel The Day of the Triffids is the story of the survival of a small group of people in a post-apocalyptic world dominated by carnivorous plants.

Philip Wylie's novel Tomorrow (1954) is the story of two American cities weathering a nuclear attack. One was prepared with an extensive civil defense plan while the other was not.

Lord of the Flies by William Golding (1954). A group of boys aged 6 to 12 are the only ones to survive a plane crash on a deserted island. With no adults, they are left to form their own society with no survival knowledge or tools.

Alas, Babylon by Pat Frank (1959) is a story dealing with life in Florida after a nuclear war with the USSR. Pat Frank also authored the non-fiction book How To Survive the H Bomb And Why. (J. B. Lippincott Company, Philadelphia, 1962.)

Hatchet is a novel that follows the life of a teenage boy as he survives solo in the Canadian wilderness after the light plane that he was on crashes.

Dies the Fire, the first book in the Emberverse Series of post-apocalyptic fiction by alternate history author S.M. Stirling. The story takes shape in a universe where electricity, guns, explosives, internal combustion engines, and steam power no longer work. More books follow in the series and flesh out the story-line in a survivalist post-Change world of agriculture, clan-based life and conflict.

Robert A. Heinlein used survivalism as a theme in much of his science fiction. Farnham's Freehold (1964) begins as a story of survivalism in a nuclear war. Tunnel in the Sky (1955) explores issues of survivalism and social interactions in an unfamiliar environment. Heinlein also wrote essays such as How to be a Survivor [14] which provide advice on preparing for and surviving a nuclear war.

Lucifer's Hammer by Jerry Pournelle and Larry Niven (1977) is about a cataclysmic comet hitting the Earth, and various groups of people struggling to survive the aftermath in southern California. Their similarly themed "Footfall" (1985) is about aliens bombarding Earth using controlled meteorite strikes to exterminate life.

The Postman by David Brin (1985) is set in a time after a massive plague and political fracture result in a complete collapse of society. It gives a very unflattering portrayal of survivalists as one of the causes behind the collapse. The quasi-survivalist "Holnist" characters are despised by the remaining population. The Holnists follow a totalitarian social theory idolizing the powerful who enforce their perceived right to oppress the weak. However later Brin stated that when he was writing the book survivalist was the best term to describe the militia movement.

Patriots: Surviving the Coming Collapse by James Wesley Rawles[15] (the editor of SurvivalBlog) is a novel about a full-scale socio-economic collapse and subsequent invasion of the US, which a review has called "a survival manual dressed as fiction." One of the most popular survivalist novels, it had circulated in an earlier draft form as shareware and had nearly 90,000 downloads in the mid-1990s, well before the Internet became heavily populated.

Edward Abbey's 1980 novel Good News is about small bands of people in the Phoenix, Arizona area trying to fend off the rise of a military dictatorship after the collapse of the economy and government.

The Survivalist is the title of a series of paperback novels by Jerry Ahern.

The antagonist of The Ghostway by Tony Hillerman is a survivalist who finances his preparations for nuclear war by working as a hit man.

Television programs

Two made-for-TV movies made during the 1980s, The Day After in the US and Threads in the UK, portray a nuclear war and its aftermath of social chaos and economic collapse. Both movies were, at the time, among the most controversial ever made for television.

"24" is a TV series about a federal agent named Jack Bauer and his attempts foil terrorist plots in Los Angeles. During Season 2 Jack's daughter, Kim Bauer, is on the run from the law and finds shelter with a survivalist.

Jericho (2006) is a TV series that portrays a small town in Kansas after a series of nuclear explosions across the United States. In the series, the character Robert Hawkins uses his prior planning and survival skills in preparation of the attacks. Most of the episodes center around the sudden collapse of American society resulting in a six way split of the country. The town usually must fight an outside enemy in order to preserve their food and supplies.

Lost, a group of crash survivors are stranded on an island with little food and only the remains of the aircraft and baggage to survive with. Over the course of the series, the survivors adapt to life on the jungle isle while some even welcome it. One of the main characters of the series, John Locke, appears to be a survivalist even before the events of the crash, both carrying knives with him as baggage, hunting and tracking skills, and was part of a pseudo-survivalist commune earlier in life.

The BBC TV series Survivors from 1975-1977 suggested a UK view of survivalism with a small band of survivors emerging from a biological apocalypse. Following the success of the new series of Doctor Who the BBC are rumoured to be looking at Terry Nation's other works and are considering a remake of the show.[16]

Survivor (2000-present) is a reality television game show which places a group of contestants in remote location and awards a prize to the one which lasts the longest. Generally, the game is structured such that a player's social skills are more important to winning than survival skills.

In the HBO TV series Six Feet Under, one of the characters' (George Sibley) delusions manifests itself as a form of survivalism, and he becomes terrified that a number of apocalyptic or damaging events, ranging from nuclear war and the disappearance of water to earthquakes, are imminent and takes precautions against it, much to the horror of his wife- who realizes that it is beyond cautious and is becoming obsessive.

Terminator: The Sarah Connor Chronicles (2008) is a science fiction show involving time travel with lead characters that take survivalist steps to prepare for, or possibly prevent, a future nuclear war.

In the parody animated cartoon King of the Hill, the Dale Gribble character is sometimes seen to prepare for emergencies including alien invasion or globally-catastrophic disasters. Expecting shortages because of the Y2K bug, Dale stocks up on cigarettes, food, and canned soda. However, a hamster that he expected to raise in order to produce meat destroys his underground cache, forcing him to find an alternative to ensure survival in the expected disaster.


Classic survival books

The text of some classic survival books and other writings from the 1950s through the 1980s can be found online:

Survival knife

Survival knife

From Wikipedia, the free encyclopedia

Survival knives are intended for survival purposes when lost in a wilderness environment. Military units issue some type of survival knife to pilots in the event they may be shot down. Hunters, hikers, and other outdoor sport enthusiasts also purchase and use great numbers of commercial survival knives. Some survival knives are heavy-bladed and thick; others are more lightweight or fold in order to save weight and bulk as part of a larger survival kit.

Origins of the survival knife

Previous to the late 19th century, outdoorsmen and military personnel did not use knives that were notably different from the knives used by butchers. Bladestock was relatively thin and the handles were often no more than two wooden slabs riveted to the tang. Around the turn of the century, Webster Marbles introduced the modern concept of the "hunting knife." These knives incorporated heavier blades, crossguards, and pommels. They very much resembled miniaturized Bowie knives. Case, Cattaraugus, and other cutlery manufacturers soon introduced similar knives of their own and it is from these that the modern concept of the survival knife is descended. These knives, along with machetes and bolos constituted survival knives as used by military, explorers, and outdoorsmen up through at least the 1930s.

Survival knife with sawteeth machined into the back side of the blade.
Survival knife with sawteeth machined into the back side of the blade.

During WWII, survival knives were issued to aircraft crew, as it was a real possibility that these personnel might be shot down over wilderness or behind enemy lines. Lifeboats aboard naval vessels also frequently contained survival kits including knives. These knives varied in design from one branch of the service to another and from one nation to another. The majority of them were simply commercial knives purchased in bulk by the military. From the Vietnam-era and to present, purpose-built survival knives evolved. The serrations often seen on more recent survival knives are intended to allow aircrewmen to cut their way free through the relatively thin metal skin of a crashed helicopter or airplane. They do not function well as woodsaws nor are they intended as such. Those knives that do include functional saw-teeth still suffer from lack of blade length limiting the thickness of what can be cut when used as a saw. Other features, such as hollow handles that could be used as storage space for matches or similar small items, began gaining popularity in the 1980s, with this knives there is a trade off, they are usually very fragile and prone to breaking. Custom or semi-custom makers such as Jimmy Lile and Bo Randall are often credited with inventing those features, but all of them can be found individually in earlier commercial knives. The movie First Blood may legitimately be credited with having created the market demand for large, serrated, hollow-handled survival knives. Knives of that description are even sometimes referred to as Rambo knives.

Some militaries, including the US, have redesigned the bayonet used with their issued rifle to include survival knife features. Historically, bayonets had functioned poorly as field knives, due to being designed primarily to turn a rifle into a thrusting weapon and only secondarily (if at all) to work as a field knife. The newer models function more acceptably for mundane tasks while retaining the capability to be attached to the muzzle of the rifle.

Examples of Survival Knives

Fixed blades

The Fällkniven F1
The Fällkniven F1
  • Fällkniven mod - WM1, F1, S1, H1, A1 or A2. The F1 and S1 (only black versions) are approved as aircrew survival knives by the US Navy and US Marine Corps, and the F1 is Swedish air force pilot issue. This knife is a standard throwing knife.
  • Becker Knife and Tool - mod. BK-7, BK-10
  • Cold Steel - SRK, Master Hunter, the SRK is approved by the U.S. Coast Guard and U.S. Navy
  • Ontario Knives - RTAK, TAK-1, RAT-3, RAT-5, 499 Airforce survival knife
  • Swamp Rat Knives - CampTramp, Howling Rat, Ratweiler
  • Bark River Knife & Tool - Northstar, Fox River, Highland Special, Bravo-1
  • Randall Made Knives - Model 15 Airman, Model 18 Attack-Survival
  • Relentless Knives - Model M1 Aviator, Model M1 MAP Model M4X
  • Ka-Bar - 1221 Next Generation Fighter/Utility, 1218/5018 USMC Fighting/Utility knife
  • Eikhorn Solingen ASEK (Aircrew Survival/Egression Knife) and KM2000
  • SOG - SEAL 2000 is approved for use by the U.S. Navy SEALs as an assault knife
  • Gerber - LMF 2 is approved by the airforce as an ASEK knife
  • Tracker - TOPS Knives, Designed by Tom Brown Jr.

Fixed blades with imbedded survival kits

  • Chris Reeve hollow handled knives
  • Randall Model 1

Folding blades

Some may consider a folding blade not durable enough however, it is more compact and easily carried. It is vitally important that the blade lock securely (to prevent injury) and be easily opened with one hand (in case one arm is incapacitated).

Multi purpose knives

Multi-tools and pocket survival tools (PST)

These are knives that have many tools that may be useful in survival situations, however the blades are usually small and these tools should be accompanied by a larger knife.[2] Sometimes, the blades are bigger, making them more usable as a primary knife, yet then extra functions are kept to a bare minimum. However, almost never do these knives posses a good blade lock, limiting their usefulness as a primary blade. Still, especially in urban emergency situations, these knives may be more useful as sometimes instead of a knife one would need for example a screwdrives, plier, ... to escape dangerous situations and when no extra equipment (eG. flexible saw, ...) is taken along.

Machetes with cutting charisteristics

Besides regular knives, some people also switch to special Machete-variations as the Golok and Parang to use as their primary (survival) knife

  • Gurkha Kukri Also, sometimes Kukhris are used in areas where it does not need to serve to clear vegetation. Popular brands are:

Neck knives

Although mostly used as a back-up, certain neck knives may be used for survival use. They are encased in hard-scale protection or are foldable.

Survival kit

Survival kit

From Wikipedia, the free encyclopedia

A survival kit is a package of basic tools and supplies prepared in advance as an aid to survival in an emergency. Military aircraft, lifeboats, and spacecraft are equipped with a survival kit. Civilians such as forestry workers, surveyors, or bush pilots, who work in remote locations or in regions with extreme climate conditions may also be equipped with survival kits. Disaster supplies kits are also kept on hand by those who live in areas prone to earthquakes or other natural disasters.

General contents

Survival kits contain supplies and tools to provide a person with basic shelter against the elements and keep warm, meet their health and first aid needs, provide food and water, signal to rescuers, and assist them in finding their way back to help. The specific supplies or tools that fit in each of these categories are listed below. Note that the list below is not the contents of an actual survival kit. Rather, each category lists some of the supplies or tools from which kit-makers choose when they are making a survival kit. Supplies in a survival kit should contain a knife (mostly preferred is a Swiss army or a multi-tool), matches, first aid kit, hand sanitizer, bandanna, fish hooks, sewing kit, and a flashlight w/ batteries.

Shelter or warmth
  • Reflective aluminum Space blanket to retain body heat
  • Lightweight emergency poncho for protection against rain
  • Emergency "tube tent", "bivvy bag" or tarp with grommets for attaching a rope
  • Mosquito net, protection against mosquitoes, flies and other insects.
  • Magnifying glass, magnesium, or tinder for fire-starting
  • Magnesium Flint and Saw Striker
  • Waterproof matches or lighter
  • Esbit or heat tablets for starting a fire
  • Dark-colored shoe polish (black preferred) for fire fuel. (It also gives off a smell that can repel animals and can be used for marking and camouflage)
  • Cable saw for cutting wood (either for constructing a shelter or for a fire)

Health and First Aid
  • First aid kit with bandages, sterile pads and gauze, first aid tape, tweezers, surgical razor, disinfectant pads, oxytetracycline tablets (for diarrhea or infection) and aspirin. Also keep an extra pair of prescription eyeglasses. Any material in the kit that may be damaged or rendered ineffective by water should be wrapped or sealed in plastic.[1]
  • Insect repellent
  • Soap
  • Toilet paper
  • Lip balm

Food and water
  • At least a three-day supply of water (one gallon per person per day: two quarts for drinking, two quarts for food preparation/sanitation).[2] To prepare safest and most reliable emergency supply of water, it is recommended you purchase commercially bottled water. Keep bottled water in its original container and do not open it until you need to use it.[3] Replace water at least once each year.[4]
  • Iodine tablets for emergency water purification
  • Edible salt for food and also can be used for brushing teeth.
  • Collapsible (empty) water bags or containers
  • Canned food, Ready-to-eat meals (MRE), or high-energy foods such as chocolate or emergency food bars.
  • Fishing line, fish hooks, lures, and split shot leads
  • Snare wire
  • Tea, gum, and hard candy (as a morale booster)

Money
  • A supply of money in small denominations and coins or credit cards in your kit helps for situations such as telephone calls (if the lines still operate) or vendors selling various goods, both essential and non-essential.[5]

[ Signaling, navigation and reference

Multipurpose tools or materials

Lifeboat survival kits

Lifeboat survival kits are stowed in inflatable or rigid lifeboats or life rafts; the contents of these kits are mandated by coast guard or maritime regulations. These kits provide basic survival tools and supplies to enable passengers to survive until they are rescued. In addition to relying on lifeboat survival kits, many mariners will assemble a "ditch bag" or "abandon ship bag" containing additional survival supplies. Lifeboat survival kit items typically include:

Safety equipment

Communications and navigation

Food and water

  • Emergency high-calorie rations and/or hard bread
  • Fishing kit
  • Rainwater collection equipment
  • Seawater desalting kit
  • Water (typically 3 liters/person)

Various tools and boating items

Optional items for military kits

Survival kits for military aviators are often modified according to the environment of operations, as described below:

  • In desert areas, survival kits may have more water and sunscreen, and have additional items such as shade hats and sun glasses.
  • In tropical areas, a survival kit may have mosquito head netting, additional insect repellent, anti-fungal cream, and a machete.
  • In arctic areas, survival kits may have additional cold weather clothing (winter hats and gloves), sleeping bags, chemical "hand warmer" packets, sun glasses/snow goggles, snow shoes, a collapsible shovel, a snare wire for small animals, a frying pan, a camp stove, camp stove fuel, and a tent designed for arctic use.
  • For personnel who are flying over large bodies of water, a survival kit may have additional items such as flotation vests, fishing nets, fishing equipment, fluorescent sea marking dye, a flare launching gun and cartridges (and perhaps a revolver and tracer ammunition), a survival radio (e.g., an AN/PRC-90), a distress marker light, seawater desalting kit, a raft repair kit, a paddle, a bailer and sponge, sunscreen, and a sun shade hat.

The US Army uses several basic survival kits, mainly for aviators, which are stored in canvas carrying bags. Aviators in planes with ejection seats have survival kits in the seat pan and the survival vest (SRU-21P) worn by US helicopter crews also contains some basic survival items.

Mini survival kits

"Mini survival kits" or "Altoids tin" survival kits are small kits that contain a few basic survival tools. These kits often include a small compass, waterproof matches, a fishing hook and fishing line, a large plastic garbage bag, a small vial of bleach, a small candle, a jigsaw blade, an Exacto knife blade, and a safety pin. Pre-packaged survival kits may also include instructions in survival techniques, including fire-starting or first aid methods. In addition, parachute cord can be wrapped around the tin. The parachute cord can be used for setting up an emergency shelter or snaring small animals. They are designed to fit within a container roughly the size of an Altoids tin.

Other meanings

Bug-out Bags

The term "survival kit" may also refer to the larger survival kits prepared by survivalists, called "bug-out bags" (BOBs) or "Get Out Of Dodge" (GOOD) kits, which are packed into large containers or duffel bags so that they can quickly be loaded onto a van or truck in the event of a disaster or social breakdown. These bags contain supplies such as food, water purification equipment, power supplies, medical equipment, transportation and communications gear, and tools. Supplies and equipment are loaded into a van or truck with bicycle racks and an extra “reserve” gas tank. Some survivalists also carry a small (e.g., 250 cc) off-road-capable motorcycle in the van or truck.

Food supplies in the bug-out vehicle include hundreds of pounds of wheat, rice, and beans, and enough honey, powdered milk, canned goods, bottled fruit, vitamins, dehydrated fruits and vegetables, salt, pepper, spices, and oil for several months. In addition, the kits often contain high-calorie energy bars, a cooking kit, utensils, liquid soap, and towels. The water supplies may include bottled water, filtering kit, bottles, collapsible water containers, and chlorine bleach for water purification. Food preparation and washing equipment may include items such as a grain grinder, a bread mixer, a strainer, a manual can opener, a steam canner with canning jars and O-rings, cutlery, knives, an electric 12-volt cooler icebox, kerosene lamps and heaters, kerosene or propane stoves, extra fuel, a clothes wringer, a foot-operated treadle sewing machine, and an electric hot plate.

The medical supplies may include a blood pressure gauge, stethoscope, scissors, tweezers, forceps, disposable scalpels, two thermometers (oral and rectal), inflatable splints, bandages, sutures, adhesive tape, gauze, burn ointment, antibiotic ointment, aspirin, rubbing alcohol, ipecac syrup, sterile water, cotton rags, soap, and cotton swabs. The transportation items may include bicycles with off-road tires, emergency tools and spare auto parts (e.g., fuses, fan belts, light bulbs, head light, tire pump, etc.), and an inflatable raft with paddles.

In addition, the kits may contain typical individual “survival kit” items, such as nylon tarps, extra clothes and coats, blankets, sleeping bags, matches (and/or other fire starting equipment), a compass and maps, rechargeable flashlights, toilet paper, soap, a pocket knife and bowie knife, a fishing kit, a portable camping stove, a backpack, paper and penci