A barrel mounted on a vertical shaft and used for heaving on ropes or chain cables. It may be power driven or operated by hand. The base of the barrel may be fitted with a clutched cable lifter for raising and lowering the anchor or handling buoy and light vessel cable.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM