This International Standard specifies requirements for the design, operation, performance and acceptance tests of automatic and non-automatic mooring winches, with hydraulic, electric or steam drive, which fulfil the functions of manoeuvring, holding and storing mooring ropes on a single drum. Such winches can also be used for warping purposes. See Table1. Table1 Functions Operation Non-automatic mooring winch Automatic mooring winch Mooring On drum Rope storing On drum Tension-maintaining through brake On drum Warping Optional on warping-end or on drum Tension-maintaining through automatic device On drum