A valve that permits flow in one direction only.

(1) A spar that extends from the bow of the boat. (2) A spar stretching diagonally across a four-sided fore-and-aft sail to support the peak.

A representation on a plane surface of the spherical surface of the earth. The equivalent of a map for use by navigators.

(1) Free, not entangled (2) To finalize all formalities in a Customs House.

Elevated structure from which coal and other cargoes can be loaded into a vessel. Name is also given to a landing-place, or loading-place.

A machine that compresses air, gases.

the weight of a specified artificial contaminant that must be added to the influent to produce a given differential pressure across a filter at specified conditions. Used as an indication of relative service life.

A fitting of wood or metal, with horns, used for securing lines (tying up).

A navigational tool used to measure distances on a chart.

Compounds containing chlorine, fluorine or bromine, used as aerosol propellants, refrigerants, foaming agents and solvents and which, on decomposition by sunlight, produce oxides of chlorine responsible for the removal of ozone from the stratosphere.

An area designated for the stowage of cargoes in container; usually accessible by truck, railroad and marine transportation. Here containers are picked up, dropped off, maintained and housed.

Sailing with the wind coming from the stern or quarter of the boat.

The watches aboard ship change at 4, 8, and 12 around the clock. A watch lasts four hours and at each half hour during the watch, a bell is struck. For instance, at 12:30 a.m. there is one bell for the first half hour after midnight; at 1:00 a.m. there ar ...

A term for a circular plank edgewise, to work in the bows of a vessel.

Consists of a vessel which is a combination of oil sump and oil separator, an oil cooler and an oil filter.

To get spliced is slang for getting married. A splice joins two lines together permanently.

any loss of performance due to the presence of contamination. Two basic types of contamination failure are: Perceptible -- gradual loss of efficiency or performance, and Catastrophic -- dramatic, unexpected failure.

Ship's intercom system

On steam vessels has responsibility for the boilers, on diesels, the evaporators and the auxiliary equipment.

Slacking a rope smartly, carefully and in small amounts.