A design of the present robust worm gear winches of 3 capacities which are constructed with a fully covered gearing (IP 54). The cable drum, the crank and all outgoing shafts are made of high quality 316 stainless steel. All fasteners are of A4 quality stainless steel. The surface treatment of the steel housing complies with the stringent paint specifications C5M according to DIN/ISO 12944. These winches can be utilized with: sea water and chemical installations.