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A non-pivoting board slotted into a sailing boat's keel to minimize leeway; it is raised and lowered through a watertight case and can be entirely removed.



Related Terms

KEELBOAT

A sailing boat with a permanent keel as opposed to a centreboard.

SHORT BOARD

A short sailing tack or leg; a long board is a long tack.

GAMMA-RAY PROBE

A gamma-ray counter built into a watertight case small enough to be lowered into a borehole.

COLLISION BULKHEAD

The foremost main transverse watertight bulkhead designed to keep water out of the forward hold in case of bow collision damage.

CENTER KEELSON

A vertical plate on the ship's centerline between the flat keel and inner bottom extending the length of the ship. Also called center vertical keel, CVK. Or center keelson.

CENTER VERTICAL KEEL

A vertical plate on the ship's centerline between the flat keel and inner bottom extending the length of the ship. Also called center vertical keel, CVK. Or center keelson.

CENTER GIRDER

A vertical plate on the ship's centerline between the flat keel and inner bottom extending the length of the ship. Also called center vertical keel, CVK. Or center keelson.

DEAD RISE

Athwartship vertical rise between the keel and the bilge

WEATHER_DECK

Uppermost continuous deck and having no overhead protection having watertight openings

COMPARTMENTATION

The subdividing of the hull by transverse watertight bulkheads so that the ship may remain afloat under certain flooding conditions

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