The shipyard trades.

I'm compiling a list of all the trades associated with building a ship in a shipyard and was wondering if I missed any. Here it is: boilermaker, blacksmith, carpenter, coremaker, crane operator, electrician, forger, ironmaker, insulator, joiner, laborer, mechanic, machinist, metalworker, moldmaker, plumber, painter, pipefitter, patternmaker, plater, rigger, ropemaker, steamfitter, shipwright, shipfitter, sheetmetal worker, sailmaker, seamstress, tool & die maker, teamster, welder.