A-2
Appendix A Glossary of Terms
DC235 / DC265
Companionway: Opening in the deck of a
boat to provide access below.
Compartment: The interior of a boat
divided off 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.
Deck: The floor-like platform of a boat that
covers the hull.
Displacement: The volume of water dis-
placed by the hull. The displacement weight
is the weight of this volume of water.
Draft: The depth of water a boat needs to
float.
Dry Rot: A fungus attack on wood areas.
Dry-dock: A dock that can be pumped dry
during boat construction or repair.
Electrical Ground: A connection
between an electrical connector and the
earth.
Engine Beds: Sturdy structural members
running fore and aft on which the inboard
engines are mounted.
EPIRB: Emergency Position Indicating
Radio Beacon. Operates as a part of a
worldwide satellite distress system.
Even Keel: When a boat floats properly as
designed.
Fathom: A measure of depth. One
Fathom = 6 feet.
Fender: A soft object of rubber or plastic
used to protect the topsides from scarring
and rubbing against a dock or another ves-
sel.
Fend off: To push or hold the boat off from
the dock or another boat.
Flying Bridge: A control station above the
level of the deck or cabin.
Flukes: The broad portions of an anchor
which dig into the ground.
Following Sea: A sea that comes up from
the stern and runs in the same direction that
the boat is going.
Fore: Applies to the forward portions of a
boat near the bow.
Foundering: When a boat fills with water
and sinks.
Freeboard: The height from the waterline
to the lowest part of the deck.
Galley: The kitchen of a boat.
Grab Rail: Hand-hold fittings mounted on
cabin tops or sides for personal safety when
moving around the boat, both on deck and
below.
Ground Tackle: A general term including
anchors, lines, and other gear used in
anchoring.
Grounds: A boat touches the bottom.
Gunwale: The upper edge of a boat’s side.
Hand Rail: Rail mounted on the boat, for
grabbing with your hand, to steady you while
walking about the boat.
Harbor: An anchorage which provides rea-
sonably good protection for a boat, with
shelter from wind and sea.
Hatch: An opening in the deck with a door
or lid to allow for access down into a com-
partment of a boat.
Head: A toilet on a boat.
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