CHARTNautical counterpart of a road map,
showing land configuration, water depths, and aids
CHECK(1) To slow or ease; to check a line is to pay
out just enough line to prevent its parting when
under a strain. (2) To investigate or examine
CHEEKOne of the sides of a block.
CHOCKDeck fitting through which mooring lines
CHRONOMETERAn accurate clock used in
CLAMP DOWNTo sprinkle the deck with water
and dry it with a swab.
CLEATA metal casting with two projecting arms to
which a line is belayed.
COAMINGBulwark around a hatch opening.
COFFERDAMA void between compartments or
tanks of a ship for purposes of insulation.
COILTo lay down a line in circular turns piled
loosely on top of one another.
COLLISION BULKHEADA bulkhead, stronger
than normal, located forward to control flooding in
the event of a head-on collision.
COLORS(1) The national ensign. (2) The
ceremony of raising and lowering the ensign.
COMBATANT SHIPA ship whose primary
mission is combat.
COMPANIONWAYDeck opening giving access to
a ladder (includes the ladder).
COMPARTMENTInterior space (room) in a ship.
COMPLETE DECKAny deck that extends the
length of a ship from side to side.
CONNStation, usually on the bridge, from which a
ship is controlled; the act of controlling the ships
COURSEA ships desired direction of travel, not to
be confused with heading, which is the direction in
which the bow is pointed at any given instant.
COVER(1) To protect. (2) A shelter. (3) Headgear,
and the act of donning same.
COXSWAINEnlisted person in charge of a boat.
DARKEN SHIPTo turn off all external lights and
close all openings through which lights could be
seen from outside the ship.
DAVITSA crane or mechanical arms that project
over the side of a ship and are used to lower or hoist
a boat in or out of the water.
DEAD AHEADDirectly ahead; a relative bearing
of 000. Dead astern is 180 relative.
DEAD IN THE WATERA ship that has stopped
and has no way on, or no movement through the
DECKHorizontal planking or plating that divides a
ship into layers.
DECK SEAMANSHIPThe upkeep and operation
of all deck equipment.
DEEP SIXTo throw something overboard.
DIPThe act of lowering a flag partway down the
staff as a salute to, or in reply to a salute from,
DISTANCE LINEA line stretched between two
ships engaged in replenishment or transfer
operations under way. The line is marked at
20-foot intervals to help the conning officer in
DIVISION(1) A main subdivision of a ships crew
(1st, E, G, and so forth). (2) An organization made
up of two or more ships of the same type.
DOCKCommonly refers to any pier or wharf; but,
strictly speaking, it refers only to the space
alongside a pier or in drydock.
DOG(1) A lever or bolt and thumbscrews used for
securing a watertight door. (2) The act of dividing a
4-hour watch into 2-hour watches.
DOG DOWNTo set the dogs on a watertight door.
DOG WATCHThe 1600 to 1800 and 1800 to 2000
DOLPHIN(1) A cluster of piles at the end of a pier.
(2) A porpoise.
DOUBLE UPTo double mooring lines for extra
DRAFTThe vertical distance from the keel to the
DRAFT MARKSThe figures fastened to the stem
and stern, the center of which indicates the draft of