aid climbing

Aid climbing is a style of climbing in which fixed or placed protection is used to make upward progress. In the Yosemite Decimal System used in the US, it is sometimes called "6th class" climbing.The term contrasts with free climbing in which no artificial aids are used to make progress. In aid climbing, the climber ascends by hanging on, and climbing on, his or her equipment; in free climbing the climber ascends by holding onto, and stepping on, natural features of the rock, using rope and equipment only to catch them in case of a fall, and to hang on at belay stations. In general, aid climbing places less emphasis on athletic fitness and physical strength but more on technical skill, though the physical aspects of hard aid climbing should not be underestimated. Aid techniques are most often utilized on extremely steep and long routes, demanding great endurance and stamina, both physical and mental.
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