The meridian from which longitude is measured eastwards or westwards. The longitude of the prime meridian, passing through Greenwich, England, is 0

A line running from near the top of the mast, used to hold the spinnaker pole in place.

A machine which aspirates gas which has already been compressed and delivers the same at higher pressure.

The upward curvature of the keel towards the bow and stern.

A condition of filter element loading in which contaminant spans the space between adjacent sections of a filter element, thus blocking a portion of the useful filtration.

Shipper's communication(s) to its agent and/or directly to the international water-carrier. Instructions may be varied, e.g., specific details/clauses to be printed on the B/L, directions for cargo pickup and delivery.

Brass work, polished (also varnished wood work in yachts).

An enemy vessel captured at sea by a privateer or a ship of war. The term is also applied to contraband cargo taken from a merchant ship.

Long wave formations during calm or light air formed by waves running into shoaling water

A change made either in the route of a shipment in transit (see Reconsignment) or of the entire ship.

The capacity for floating.

The difference between the diameter of a shaft rod, etc., and that of the hole in which it works.

Customer designated as party paying for services.

The total pressure measured from absolute zero ( i.e., from an absolute vacuum).

To place pieces of dunnage in between pieces of cargo in order to prevent shifting of the cargo.

A system of reefing a sail by partially furling it. Roller furling systems are not necessarily designed to support roller reefing.

At or in the direction of the bow. Also the fore part of the ship.

To take the opposite tack when sailing to windward with another yacht.

Energy which a substance possesses because of the motion and configuration of its atoms, molecules, and subatomic particles.

Loaded containers moving within the railroad system that are not clearly identified on any internally generated reports.