- castor and pollux
- castrametation
- cast the wrong way
- casualties
- cat
- catalan
- catamaran
- catanadromi
- catapult
- cataract
- catascopia
- cat-beam
- cat-block
- catch
- catch a crab
- catch a turn there
- catch-fake
- caterer
- cat-fall
- cat-fish
- cat-gut
- catharpin legs
- cat-harpings
- cat-head
- cat-holes
- cat-hook
- cat-lap
- cat o' nine tails
- catraia
- cat-rig
- cat-rope
- cat's-paw
- cat's-skin
- cat's-tail
- cathead-stopper
- cat-stopper
- cat-tackle
- cattan
- cat the anchor
- catting
- catty
- caudal fin
- caudicariæ
- caul
- caulk, to
- caulker
- caulker's seat
- caulking of a ship
- caulking-butt
- caulking-irons
- caulking-mallet
- caury
- cavalier
- cavallo
- cavalot
- cavalry
- caver
- caviare
- cavil
- cavity
- cawfe
- cawe
- cawker
- cayos
- cay
- caze-matte
- cazerns
- c.b.
- cease firing
- ceiling
- cells
- celetes
- celoces
- cement, roman
- centime
- centinel
- central eclipse
- centre
- centre of buoyancy, of displacement , and of immersion, of cavity
- centre of immersion, of displacement , and of buoyancy, of cavity
- centre of displacement, of immersion, and of buoyancy, of cavity
- centre of cavity, of displacement, of immersion, and of buoyancy
- centre of gravity
- centre of motion
- centurion
- ceola
- ceradene
- cercuri
- certificate
- certify, to
- cessation of arms
- cetine
- c.g.
- chad
- chafe, to
- chaffer
- chafing-cheeks
- chafing-gear
- chain
- chainage of ship