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2. 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 ...

3. 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.

4. 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.

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

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

   Greetings from the Philippines! I was horrified the other day when I chanced upon these climbers belaying with an ascender. I gave them my best advice because I thought there was about to be a ...

6. 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 ...

7. Single-rope technique - Wikipedia

   en.wikipedia.org/wiki/Single-rope_technique

   Sit-stand systems (also known as frog rig) - one ascender is at chest level attached to the sit harness, and a second is held in the hand with a long loop of rope for the feet. Movement up the rope is by repeated moving of the foot loop ascender up the rope, pushing up with both feet together, and sitting, supported by the chest ascender.