studies plans and specifications and prepares templates or scale plans for fabrication or cutting of hull sections
marks reference points and lines on drydocks or slipways
checks position and functioning of slipway apparatus
builds bilge and keel block supports, cradles and shoring
directs the erection, alignment and securing of hull sections
organises the welding or fixing of hull sections
erects and prepares launching platforms, conducts pre-launch tests and supervises launching procedures
installs masts, frames, decking, fittings, machinery, shafts and safety equipment
determines repair requirements and procedures
repairs or replaces faulty plating, fittings or accessories
may make hull moulds and fabricate or repair vessels using materials such as aluminium, wood, glass reinforced plastics, carbon fibre, kevlar, fibreglass or concrete