Product Code Database
A pit cave, shaft cave or vertical cave—or often simply called a pit (in the US) and pothole or pot (in the UK); jama in Slavic languages scientific and colloquial vocabulary (borrowed since early research in the Western Balkan Dinaric Alps)—is a type of cave which contains one or more significant vertical shafts rather than being predominantly a conventional horizontal cave passage. Pits typically form in limestone as a result of long-term erosion by water. They can be open to the surface or found deep within horizontal caves. Among US , a pit, usually referred to as a 'pitch' in UK English, is a vertical drop of any depth that cannot be negotiated safely without the use of ropes or ladders.
Vertical caving is a specialized sport that should be undertaken only after acquiring knowledge of, and expertise in, proper vertical caving equipment and its use. For obvious reasons, vertical caving is more dangerous than "horizontal caving". Vertical caving requires an understanding of ropes, knots, anchors, abseiling/rappelling devices and ascending systems, and techniques for passing rebelays, deviations, knot passes (where two ropes are joined mid-hang) and changeovers (the act of switching from rappel to climb, or vice versa, whilst on rope). Experienced cavers are typically knowledgeable in self-rescue techniques such as rigging pulley-jammers and doing pick-offs (the act of rescuing a stranded caver from his rope and returning him/her to the ground).
During World War II, a team composed of Pierre Chevalier, Fernand Petzl, Charles Petit-Didier and others explored the Dent de Crolles cave system near Grenoble, France. It became known as the deepest cave in the world () at that time. The lack of available technical equipment during the war forced Chevalier and his team to innovate and develop their own. The scaling-pole (1940), nylon ropes (1942), use of explosives in caves (1947), and mechanical rope ascenders (Henri Brenot's "monkeys", first used by Chevalier and Brenot in a cave in 1934) can be traced historically to the exploration of the Dent de Crolles cave system.
In the late 1950s, American caver Bill Cuddington further developed the single rope technique (SRT) in the United States. In 1958, two Swiss alpinists, Juesi and Marti, teamed up, creating the first rope ascender, known as the Jumar. In 1968, Bruno Dressler asked Petzl, who worked as a metals machinist, to build a rope-ascending tool, today known as the Petzl Croll, which he had developed by adapting the Jumar to the specificity of pit caving. Pursuing these developments, in the 1970s Fernand Petzl started a small caving equipment manufacturing company. The development of the rappel rack and the evolution of mechanical ascension systems, notably helped extend the practice and safety of pit exploration to a larger practice by established cavers.
==Gallery==
|
|
