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GLOSSARY OF TERMS
Aft: In, near or toward the stern of a boat.
Aground: A boat stuck on the bottom.
Amidships: In or toward the part of a boat midway
between the bow and stern.
Anchor: A specially shaped heavy metal device
designed to dig eciently into the bottom under a
body of water and hold a boat in place.
Anchorage: An area specically designated by
governmental authorities in which boats may anchor.
Ashore: On shore.
Astern: Behind the boat, to move backwards.
Athwartship: At right angles to the center line of
the boat.
Barnacles: Small, hard-shelled marine animals
which are found in salt water attached to pilings,
docks and bottoms of boats.
Beam: The breadth of a boat usually measured at
its widest part.
Bearing: The direction of an object from the boat,
either relative to the boat’s direction or to compass
degrees.
Berth: A bunk or a bed on a boat.
Bilge: The bottom of the boat below the ooring.
Bilge Pump: A pump that removes water that
collects in the bilge.
Boarding: Entering or climbing into a boat.
Boarding Ladder: Set of steps temporarily tted
over the side of a boat to assist persons coming
aboard.
Boat Hook: Short shaft of wood or metal with a
hook tting at one end shaped to aid in extending
one’s reach from the side of the boat.
Bow: The front end of a boat’s hull
Bow Line: A line that leads forward from the
bow of the boat.
Bow Rail: Knee high rails of solid tubing to aid
in preventing people from falling overboard.
Bridge: The area from which a boat is steered
and controlled.
Bridge Deck: A deck forward and usually above
the cockpit deck.
Broach: When the boat is sideways to the seas
and in danger of capsizing; a very dangerous situ-
ation that should be avoided.
Bulkhead: Vertical partition or wall separating
compartments of a boat.
Cabin: Enclosed superstructure above the main
deck level.
Capsize: When a boat lays on its side or turns
o v e r.
Chock: A deck tting, usually of metal, with
inward curving arms through which mooring or
anchor lines are passed so as to lead them in the
proper direction both on board and o the boat.
Cleat: A deck tting, usually of metal with pro-
jecting arms used for securing anchor and moor-
ing lines.
Closed Cooling System: A separate supply of
fresh water that is used to cool the engine and
circulates only within the engine.
Coaming: A vertical piece around the edges of
cockpit, hatches, etc. to stop water on deck from
running below.
Cockpit: An open space, usually in the aft deck,
outside of the cabin.
Companionway: Opening in the deck of a boat
to provide access below.
Compartment: The interior of a boat divided o
by bulkheads.
Cradle: A framework designed to support a boat
as she is hauled out or stored.
Cutlass Bearing: A rubber bearing in the strut
that supports the propeller shaft.
Appendix C:
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