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2. Butterfly loop - Wikipedia

   en.wikipedia.org/wiki/Butterfly_loop

   The butterfly loop, also known as lineman's loop, butterfly knot, alpine butterfly knot and lineman's rider, is a knot used to form a fixed loop in the middle of a rope. Tied in the bight , it can be made in a rope without access to either of the ends; this is a distinct advantage when working with long climbing ropes.

3. Three-point turn - Wikipedia

   en.wikipedia.org/wiki/Three-point_turn

   Performing a three-point turn (shown for right-hand traffic). The three-point turn (sometimes called a Y-turn, K-turn, or broken U-turn) is the standard method of turning a vehicle around to face the opposite direction in a limited space, using forward and reverse gears.

4. Rock-climbing equipment - Wikipedia

   en.wikipedia.org/wiki/Rock-climbing_equipment

   Some climbers will use a single full-thickness climbing rope with a diameter of approximately 9 to 11 mm (0.35 to 0.43 in), and some will use double ropes, or "half-ropes", to reduce rope drag (e.g. one rope is clipped into any given anchor or protection point), which have a reduced thickness of approximately 8 to 9 mm (0.31 to 0.35 in) to ...

5. Can You Really Use An Ascender As A Belay Device? These ... - AOL

   www.aol.com/news/really-ascender-belay-device...

   Also, feeding a rope through an ascender requires that you hold the cam open. If the leader were to fall when the cam was held open … you get the idea. Beyond any safety issues, most ascenders ...

6. Ascender (climbing) - Wikipedia

   en.wikipedia.org/wiki/Ascender_(climbing)

   A pair of left and right handed ascenders (the left rigged to a rope) An ascender is a device (usually mechanical) used for directly ascending, or for facilitating protection, with a fixed rope when climbing on steep mountain terrain. A form introduced in the 1950s became so popular it began the term "Jumar" for the device, and the verb "to ...

7. Fixed rope - Wikipedia

   en.wikipedia.org/wiki/Fixed_rope

   In climbing and mountaineering, a fixed-rope (or fixed-line) is the practice of installing networks of in-situ anchored static climbing ropes on climbing routes to assist any following climbers (and porters) to ascend more rapidly—and with less effort—by using mechanical aid devices called ascenders.