arms

boat

caucasian

command

control

coverall

earphones

ecr

electronic

engine

engineer

equipment

folded

generator

indoor

industry

inspection

liner

machine

machinery

male

marine

mariner

maritime

mechanic

mechanism

metal

motor

nautical

occupation

one

person

pipe

plugs

profession

professional

propulsion

room

serviceman

ship

shipping

start

stop

technician

torchlight

uniform

vessel

worker

working