Breakwater
A structure, usually stone or concrete,built
to create a harbor or impro ve an existing
one.
Bulkhead
Vertical par tition in a boat.
Burdened Vessel
Former term for the vessel which must sta y
clear of vessels with the right-of-w ay.
Calking (Caulking)
Forcing filler material into the seams of the
planks in a boat’ s deck or sides, to mak e
them watertight.
Camber
The arch of a deck, sloping downw ard from
the center tow ard the sides.
Capsize
To turn over.
Carburetor Backfire Flame Ar restor
Required equipment on all motorboats
except outboards and diesels. Reduces
chance of fire caused b y backfires in inter-
nal combustion engines.
Cardinal Points
The four main points of a compass; nor
th,
east, south, and w est.
Ceiling
The inside lining of the hull.
Certificate
Government paper, such as a boat’ s license.
Chart
A map of a body of w ater that contains pilot-
ing information.
Chine
The intersection of sides and bottom of a
boat.
Cleat
A piece of wood or metal with projecting
ends to which lines are made fast.
Clinker
A method of planking in which the low er
edge of each strak e overlaps the upper
edge of the strak e next below . (Also called
lapstrake.)
Coaming
A raised edge, as around par t or all of a
cockpit, that pre vents seawater from enter-
ing the boat.
Coast Guard
The federal marine la w enforcement and res-
cue agency in the US.
Cockpit
A well or sunk en space in the afterdeck of a
small boat for the use of the helmsman and
crew.
Companionway
A hatch or entrance, from deck to cabin.
Compass
The instrument which shows the heading of
a vessel.
Cowls
Hooded openings used for ventilation.
Cradle
A frame used to suppor t a vessel on land.
Current
The movement of the w ater in a horizontal
direction.
Deadrise
The rise of the bottom of a midships frame
from the keel to the bilge.
Deck
Any permanent covering over a compar t-
ment.
Deep-six
To discard or throw o verboard.
Dinghy
A small, open boat.
Displacement Hull
Type of hull that plows through the w ater
even when more pow er is added.
Dock
An enclosed or near ly enclosed w ater area;
all the por t installations; a place where ves-
sels can moor , as a pier , wharf, or floating
dock.
Documented Vessel
Vessel registered with the U.S. Coast Guard.
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