An autoblock (or autobloc or "third hand") is a rope device used in climbing and caving for both rappelling (downward) and ascending (upward). While rappelling, it slides freely down the rope when pushed downward by the hand, allowing a controlled descent, but jams in the event of a sudden drop or loss of control, stopping the descent. This prevents uncontrolled falls in the event of an accident in which the abseiler loses control of the rope. For ascending, it likewise can be pushed up the rope manually when unweighted, but jams and holds when weighted by the body.
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| - Autoblock (en)
- Bloker (pl)
- Автоблок (ru)
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| - Bloker – węzeł stosowany we wspinaczce, podobnie jak prusik – czyli m.in. do autoasekuracji podczas zjazdu na linie. Jest łatwy w przesuwaniu, ale nie da się zawiązać jedna ręką; w przypadku węzła Prusika jest to możliwe; jest to ważna cecha węzłów, szczególnie w alpinizmie. (pl)
- Автоблóк (у́зел Маша́ра, францу́зский обмóточный у́зел, обмóточный у́зел, францу́зский схвáтывающий у́зел) — схватывающий узел, работающий в обоих направлениях. Завязывают репшнуром вокруг основной альпинистской верёвки (на 10 мм верёвке используют репшнур 7 мм). В альпинизме используют для самостраховки. Изобретён в 1961 году Сéржем Машáром (фр. Sérge Machárd). (ru)
- An autoblock (or autobloc or "third hand") is a rope device used in climbing and caving for both rappelling (downward) and ascending (upward). While rappelling, it slides freely down the rope when pushed downward by the hand, allowing a controlled descent, but jams in the event of a sudden drop or loss of control, stopping the descent. This prevents uncontrolled falls in the event of an accident in which the abseiler loses control of the rope. For ascending, it likewise can be pushed up the rope manually when unweighted, but jams and holds when weighted by the body. (en)
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| - An autoblock (or autobloc or "third hand") is a rope device used in climbing and caving for both rappelling (downward) and ascending (upward). While rappelling, it slides freely down the rope when pushed downward by the hand, allowing a controlled descent, but jams in the event of a sudden drop or loss of control, stopping the descent. This prevents uncontrolled falls in the event of an accident in which the abseiler loses control of the rope. For ascending, it likewise can be pushed up the rope manually when unweighted, but jams and holds when weighted by the body. It is made using a friction hitch around the rope, connected by a carabiner to the climber's harness, and may be combined with other climbing equipment for further safety. For instance, it is typically used as a backup while rappelling using a tube belay device. The term autoblock is also used for a specific type of friction hitch, which is also known as a French prusik or Machard knot, named after its inventor, Serge Machard. Other friction hitches that can be used to build an autoblock system include the Prusik knot, Klemheist knot, and Bachmann knot. The Ashley Book of Knots #505. (en)
- Bloker – węzeł stosowany we wspinaczce, podobnie jak prusik – czyli m.in. do autoasekuracji podczas zjazdu na linie. Jest łatwy w przesuwaniu, ale nie da się zawiązać jedna ręką; w przypadku węzła Prusika jest to możliwe; jest to ważna cecha węzłów, szczególnie w alpinizmie. (pl)
- Автоблóк (у́зел Маша́ра, францу́зский обмóточный у́зел, обмóточный у́зел, францу́зский схвáтывающий у́зел) — схватывающий узел, работающий в обоих направлениях. Завязывают репшнуром вокруг основной альпинистской верёвки (на 10 мм верёвке используют репшнур 7 мм). В альпинизме используют для самостраховки. Изобретён в 1961 году Сéржем Машáром (фр. Sérge Machárd). (ru)
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