Vertical caving terminology and methods > Personal SRT gear
An ascender that is connected via a footloop to the opposite foot from the foot jammer, used as one of the main ascenders when using rope walking, and with the original variation of the another prusiking system. Allows feet to be used independently. It is normally pulled upwards by a bungee cord connected to the chest harness. A safety cord is used to connect the ascender to the D-ring. Makes it difficult to pass deviations and rebelays because it is so far from your hands. Despite its name, it is worn over the thigh, but its name is intentionally used to avoid confusion with a lower jammer, since it is never raised using the hands. Historically, it used to be strapped just above the knee instead of using bungee cord, so the name was more appropriate.
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