Subject to Mechanical and electrical hazards, ultra violet light vibration, noise, and a variety of other physical conditions such as a proximity to moving mechanical parts, working on scaffolding and ladders at height greater than 6 ft., working over water, working in confined spaces, dramatic temperature changes, fumes, smoke, dust, gases, chemicals, and hydrocarbons. Fabricates, erects, installs, and repairs structures and fixtures of wood, plywood, wallboard, and all other such components related to the construction and completion of work aboard ships and in shipyard facilities following blueprints, lay-out drawings, sketches, building plans, or oral instructions.