To repair, clean or paint the hull.

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 solid wharf or structure built of stone along the edge of a harbor used for loading and offloading of cargo, and embarkation and disembarkation of passengers.

(1) To adjust the sails for best advantage. (2) Fore and aft balance of a boat. If either the bow or stern is depressed, the vessel is said to be down by the bow or down by the stern. (3) To trim is to adjust. It does not just apply to sheets. You can tri ...

Search of a vessel, by Customs authorities, for unreported goods.

Said of a lighthouse not tended.

A tiller or a wheel generally installed on the bridge or wheelhouse of a ship to turn the rudder during manoeuvering and navigation. It is in fact the steering wheel of the ship.

(1) To throw, as to heave a line ashore. (2) An upward pull on a line; to lift (3) The rise and fall of a vessel in a seaway.

A rope used for securing any movable object in place

The increase in pressure in the discharge header that develops as a result of flow after the pressure relief device opens

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.

The compression of an air actuator (air spring) below its design height.

The country in which the vessel is registered.

An instrument that, once established, cannot be modified or cancelled without the agreement of all parties concerned.

A projecting aperture at the end of a tube, pipe etc. serving as an outlet for compressed air. Reduces the demand on the compressor by generating the highest thrust and volume for the lowest possible air consumption.

Ropes hung and used for assistance in ascending and descending.

A large foresail or jib that overlaps the mainsail. Also known as a genny. Can be expressed in percentages of overlap, e.g. 150 Genoa is 50% overlap of the mainsail.

Permanent pip iron ballast specially shaped and placed along each side of keelson. Name is sometimes given to any iron ballast.

The toal temperature at the intake flange of the compressor.

The highest continuous deck which runs the full length of the ship without a fall or interruption.