A through hull valve, a shut off on a plumbing or drain pipe between the vessel and the sea

A ship designed to carry either ore or oil in bulk.

The middle watch.

A rope passed round a man in the chains, while sounding.

Load/unload control system that tries to maximizes compressor efficiency by matching air delivery and air demand. Compressor is operated at full load or idle

When freight appears to be free of damage so far as a general survey can determine.

A point of sail where the boat is sailing at a right angle to the wind (wind coming from abeam). A beam reach is usually the fastest point of sail. A beam reach is a point of sail between a broad reach and a close reach.

The record of courses steered and distances traveled since the time a ship's position was last fixed by shore or astronomical observations.

A sailboat is always on one tack or the other; that is the sail is always on one side or the other.

A means of hauling up or lowering a cylindrical object.

(1) The alternate rise and fall of the bow of a vessel proceeding through waves; also called hobby horsing (2) The theoretical distance advanced by a propeller in one revolution. (3) Tar and resin used for caulking between the planks of a wooden vessel.

The power required to compress a gas isothermally through a specified range of pressures.

The relationship (ratio) between the sails height (luff length) and length along the foot. High aspect ratio means a sail that is tall and narrow, low aspect ratio is a short, squat sail. A high aspect ratio sail is very efficient in sailing close to the ...

The position of anchor as it is raised clear of the bottom.

An arbitrary filter efficiency rating.

Supporting braces made into a right angle, used for strength when two parts are joined.

A ship designed to carry all types of general cargo, or "dry cargo."

Removal of worn or damaged gear and the fitting of new gear in replacement.

The place where a vessel lies. The place in which a man sleeps.

Cargo ship of 14.800 tonnes deadweight.