Companion—The entrance from the deck to the cabin below.
Compass bowl—The bowl in the binnacle that contains the compass.
Corinthian—A term in yachting possessing the same significance as amateur; the opposite of professional.
Counter—That part of a vessel which projects abaft the sternpost.
Covering board—The outside deck plank fitted over the timber heads. The same as planksheer.
Cracking on—Carrying a press of sail.
Crank—Not stiff under canvas; easily heeled or listed.
Cranze or Cranse—A metal band with eyes on it fitted to the end of a bowsprit or other spar.
Cringle—A metal thimble worked in the clews and leeches of sails.
Dandy—A cutter-rigged vessel with lug-mizzen set on a jigger-mast.