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African fine straight grained hardwood timber. Dark coloured, easily hand worked and acceptable for marine use.

Related Terms

IALA MARITIME BUOYAGE SYSTEM

A buoyage which is now implemented by most maritime nations. Within the single system there are two buoyage regions, designated as Region A and Region B, where lateral marks differ only in the colors of port and starboard hand marks. In Region A, red is to port on entering; in Region B, red is to starboard on entering. The system is a combined cardinal and lateral system, and applies to all fixed and floating marks, other than lighthouses, sector lights, leading lights and marks, lightships and large navigational buoys.

HAND

To furl a sail.

KLAXON

A diaphragm horn similar to a nautophone, but smaller, and sometimes operated by hand

PROPELLER WALK

The tendency for a propeller to push the stern sideways. In theory a right hand propeller in reverse will walk the stern to port.

PORT SIDE

The left hand side of a ship facing the front or forward end. The port side of a ship during darkness is indicated by a red light. Was previously known as the larboard side but this created confusion with starboard and was changed.

COMPARING WATCH

A watch used for timing observations of celestial bodies. Generally its error is determined by comparison with a chronometer, hence its name. A comparing watch normally has a large sweep second hand to facilitate reading time to the nearest second. Sometimes called HACK WATCH.

MANUAL RESET DEVICE

A component of a control which requires resetting by hand to restart after safe operating conditions have been restored.

BOSUN'S CALL

A whistle used by Boatswains (bosuns) to issue commands. Consisting of a metal tube which directs the breath over an aperture on the top of a hollow ball to produce high pitched notes. The pitch of the notes can be changed by partly covering the aperture with the finger of the hand in which the pipe is held. The shape of the instrument is similar to that of a smoking pipe.

SLOW-OPENING VALVE

Valve that requires a minimum of five full turns of its hand wheel to be fully open or closed.

CHANNELS

Extension boarding at deck level to increase the width of the hull of a sailing ship for the lower stays land upon, thus providing a wider angle of mast support. The traditional position from which a seaman heaved a hand lead line (to establish depth).
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