The space between decks. The name of the deck or decks between the ceiling and main deck.

Loan issued against some security

ACRONYM - MATERIAL SAFETY DATA SHEETS

Daily; occurring once a day.

Long-range navigation system that uses radio signals transmitted at specific times. An onboard receiver computes position by measuring the difference in time of signal reception. This system is being phased out in favor of GPS.

The horsepower input to the compressor shaft, or more generally to any driven machine shaft.

Difference between minimum and maximum pressures for an air compressor. Also called cut in-cut out or load-no load pressure range.

The power required at the compressor drive shaft. Losses in external transmissions such as gears and belt drives are not included.

The borrowing of money by the master using his ship as security.

Sudden and rapid flow of tide in certain rivers and estuaries which rolls up in the form of a wave. also known as Eagre.

An instrument that uses sound waves to measure the distance to the bottom.

A design in which the forestay runs to the top of the mast.

When used in pricing terms such as "Ex Factory" or "Ex Dock," it signifies that the price quoted applies only at the point of origin indicated.

Turbines or engines in which gas expands, does work, and undergoes a drop in temperature.

Compression of a flat or standard bale of cotton to approximately 32 pounds per cubic foot. Usually applies to cotton exported or shipped coastwise.

Floating wreckage from a shipwreck.

see Holystone

Waves breaking over rocks or shoals. A wave that approaches shallow water, causing the wave height to exceed the depth of the water it is in, in effect tripping it. The wave changes from a smooth surge in the water to a cresting wave with water tumbling d ...

An old term for getting married.

A term applied to a bracket supporting the after end of the propeller shaft and the propeller.