A form requiring all data in a commercial invoice along with a certificate of value and/or a certificate of origin. Required in a few countries (usually former British territories) and usually serves as a seller's commercial invoice.

Freight moving from origin to destination over the Freight lines of two or more transportation carriers.

The pressure encountered on the return side of a system.

Also known as PM, maintenance performed according to a fixed schedule involving the routine repair and replacement of machine parts and components.

Short ton

An able-bodied seamen entrusted with the steering of a vessel when entering or leaving a harbor. He is also involved with the use and upkeep of navigational equipment.

(1) A false keel. (2) The projection of the keel abaft the stern frame where the spindle of the rudder rests.

Loose and broken ice in bays, or along exposed edges of floes.

A measurement. The international unit of energy. One joule is equal to one WATT - second or 0.737 foot pounds.

The mechanical power required to compress polytropically and to deliver, through the specified range of pressures, the gas delivered by the compressor.

Is another term for saturated vapor pressure.

To give the steersman the de-sired course to be steered.

A reference book named after the original author, Nathaniel Bowditch. Updated versions contain tables and other information useful for navigation.

The recognition of a person by his recognizable characteristics (originally, the shape of the nose)

The aft edge of a sail, more commonly called the leech.

Water service between two coasts; in the U.S., this usually refers to water service between the Atlantic and Pacific or Gulf Coasts.

A material (such as oil) used between moving parts of machinery to make the surfaces slippery and reduce friction.

Compressor controls will run the compressor at varying loads to accommodate demand variations. Running a compressor at less than full load results in a drop in compressor efficiency and thus an increase in operating costs.

Steps in the compression of a gas, In reciprocating compressors, each stage usually requires a separate cylinder, in dynamic compressors, each requires a separate rotor disc.

A two-masted vessel with foremast square rigged, and mainmast fore and aft rigged. Originally, a ship of brigands, or pirates.