Scoop like devices used to direct air into and ventilate a boat.

Flapping (of sails)

Heavy-weather practice of pouring oil on the sea so as to form a film on the surface, thus preventing the seas from breaking. To smooth out some difficulty.

A bend or hitch used to attach a line to a ring or spar so that by pulling the end of the line, the hitch will come free. This is done by passing a bight of the line under the other part so that when strain is applied the bight is jammed. A pull on the en ...

The anti-corrosive paint used on and above the waterline.

Air or vapor given off or expelled as a byproduct or result of an operation or treatment process.

C The international temperature scale where water freezes at 0 (degrees) and boils at 100 (degrees). Also known as the centigrade scale.

A set of radio, sound, and visual signals designed to aid in communications between vessels without language problems. It can be used with Morse Code, with signal pennants, and by spoken code letters.

Any rope or line.

Center point of all underwater area of the hull where the hull's lateral resistance can be said to be centered.

The location from which the boat is steered, usually in the middle or at the stern of the boat.

A free port in a country divorced from Customs authority but under government control. Merchandise, except that which is prohibited, may be stored in the zone without being subject to import duty regulations.

The wind direction indicator on the masthead.

Small struts or spars extending toward the sides from one or more places along the mast. The shrouds cross the end of the spreaders, enabling the shrouds to better support the mast. Also known as crosstrees in older vessels.

A stationary element between stages of a multistage centrifugal compressor. It may include guide vanes for directing the flowing medium to the impeller of the succeeding stage. in conjunction with an adjacent diaphragm, it forms the diffuser surrounding t ...

block

Placing a container where required to be loaded or unloaded.

Another term for a marine railway.

Steel section running along the length of each bottom edge of a shipping container giving its structural strength.

The imaginary line running from bow to stern along the middle of the boat.