Weld ocean-going hulls and hatches together on massive ships.
Operates machines to dry hypalon or neoprene rubber solution to form film, to shape film into rope, and to cut rope into chips: Moves controls on panel to start rotating drum drier, pumps, and blowers, and to adjust speeds of roper machine and drier. Observes meters and gauges to verify pressures and temperatures of machines. Moves dials on automatic instruments to set and adjust level of rubber solution in drier and flow of steam through drier. Turns valves to regulate flow of cooling water and temperature in cooling drum. Threads film of rubber from drier through guiding rolls and slots of roper and through automatic cutting machine. Keeps production and storage records. Gives directions to workers in cleaning equipment, weighing, stenciling, and storing articles, filling roper chamber with talc, and in packing finished rubber chips into bags or drums.