Windlass

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A windlass is an apparatus for moving heavy weights. Typically, a windlass consists of a horizontal cylinder (barrel), which is rotated by the turn of a crank or belt. A winch is affixed to one or both ends, and a cable or rope is wound around the winch, pulling a weight attached to the opposite end.

Windlasses are used on boats to raise anchor as an alternative to a vertical capstan. See anchor windlass.

Crossbows may also use windlasses as a cocking mechanism.

Windlasses are vital in the operation of almost all locks on the British Inland Waterways.