Capstan is a vertical axis rotating machine used on boats to increase the seafarer’s pulling force when towing ropes and cables. The principle is similar to that of a windlass, which has a horizontal axis. The marine capstan on a boat is typically located on the deck, usually towards the bow (front) or stern (rear) of the vessel, depending on the boat's design and purpose. A capstan is a vertical-axled rotating machine used on ships for various purposes, such as mooring, anchoring, or hauling heavy loads like anchor chains or ropes. It consists of a drum or cylindrical barrel mounted vertically on a spindle, often powered by hydraulic, electric, or manual means. The location of the capstan allows for efficient handling of ropes, cables, and anchors during docking, anchoring, or other maritime operations.

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