- caisson
- cap
- captaincy
- caboose
- cant
- captain
- captor
- cast
- carrier
- cat
- chase-gun
- chain-wale
- chart
- chaser
- charterer
- clear
- chuck
- clap
- claw
- clearance
- cleat
- clearing
- clench
- clew
- coat
- clinch
- cockbill
- coffin
- colour
- colt
- commissioned
- come
- commission
- company
- compass
- conical buoy
- compartment
- composite
- conning
- cone
- consort
- constructor
- cont-line
- cook-house
- cordage
- corvette
- cot
- counter
- cradle
- crank
- craft
- crinoline
- crowd
- cruising
- crutch
- cringle
- cutlass
- cruiser
- davit
- dazzle
- dan
- dead-eye
- deadlight
- dead-wind
- dandy
- deck
- decoy-ship
- degauss
- demurrage
- destroyer
- depth-charge
- depth-bomb
- distress-gun
- disrate
- dive
- doctor
- displacement
- distress-rocket
- dogshore
- dock
- dog-watch
- doldrums
- douse
- drag-anchor
- draw
- double
- double-bitt
- drag
- draught
- drawn
- drift-anchor
- dry-cargoship
- drew
- droit
- drumhead
- due
- dunnage
- earing
- ease
- easting