Weld ocean-going hulls and hatches together on massive ships.
Operates machine to mix various charges of molten metal and maintain metal at specified temperature for use in converters and furnaces: Moves controls to raise lid of mixer and signals OVERHEAD CRANE OPERATOR 921.663-010 to pour metal from transfer ladle into mixer. Turns controls to adjust fuel and air mixture to mixer burners to maintain specified temperature in mixer, and to rotate arm that mixes molten metal. Signals OVERHEAD CRANE OPERATOR to position ladle for receiving molten metal from mixer for delivery to converters or furnaces. Moves controls to tilt mixer and fill ladle. Inserts long-handled spoon in ladle to obtain sample of molten metal and pours sample into mold for laboratory analysis. Repairs mixer lining, using refractory materials and handtools.