Is a positive displacement reciprocating compressor using a flexible membrane or diaphragm in place of a piston.

A power or sailing boat used by pi-lots (men who have local knowledge of navigation hazards of ports).

PSI - Pounds per square inch.

Pair of hooks linked together and attached to a crane.

The speed needed for a boat to begin planing.

To move ahead swiftly. To move ahead of another vessel quickly when underway.

A machine used to pick up and move goods loaded on pallets or skids.

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

Sails that lie in the direction of the ship's length and whose luffs abut the masts or are attached to stays.

An apparatus consisting of an outside shell and a sheave through which a rope may be passed (pulley).

Articles packed so that one rests partially or entirely within another, thereby reducing the cubic-foot displacement.

A device that indicates pressure differential above or below atmospheric pressure.

The magnetic compass used by the navigator as a standard.

Canvas, cloth, leather, tubing, rubber or other material placed around a line or cable to protect it from wear and abrasion

A spring line tied from the boat to chain rode, usually near the water's surface. It helps disperse tension forces. It also prevents damage to the boat by ground tackle and can help in the retrieval of the ground tackle in heavy weather.

Waterproof clothing.

Port of initial Customs entry of a vessel to any country. Also known as First Port of Call.

A volume. Cubic meters per second.

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

A person or firm performing a consolidation service for others. The consolidator takes advantage of lower full carload (FCL) rates, and savings are passed on to shippers.