Those frames of a ship's hull which are equal in area, one forward and one aft of the ship's center of gravity.

A line led to a sail, but is not currently in use. The line currently in use is known as the working sheet. Usually the working and lazy sheets change when the boat is tacked.

Uncharted navigational danger that has been reported but has not been verified by survey.

To prevent contact with an object while bringing the ship alongside.2. To push off when making a landing.

A sighting taken for celestial navigation at noon, when the sun is at its highest point in the sky.

To stand at the mast and pull down on a halyard as another crewmate winches it in.

Dining room facilities and kitchen for crew separate from the passenger dining room and kitchen.

see Gybe

A sailor's trunk; the intake between the ship's side and a sea valve.

To repair, clean or paint the hull.

The bearing of an object after magnetic variation has been considered, but without compensation for magnetic deviation.

A barge equipped with tracks on which up to about 12 railroad cars are moved in harbors or inland waterways.

A weight attached to a line used to determine depth by lowering it into the water.

A deck exposed to the wind and sea.

The course of a vessel after magnetic variation has been considered, but without compensation for magnetic deviation.

U.S. Customs' automated program under AMS. It allows for electronic reporting of inbound (foreign) cargoes in the U.S.

Time and date for payment of a draft.

An absolute temperature scale. ((

The International Convention for the Prevention of Pollution from Ships, 1973, as modified by the Protocol of 1978.

Distance at sea is measured in nautical miles, which are about 6067.12 feet, 1.15 statute miles or exactly 1852 meters. Nautical miles have the unique property that a minute of latitude is equal to one nautical mile - Measurement of speed is done in knots ...