A member of the deck crew who is able to perform all the duties of an experienced seamen; certificated by examination; must have three years sea service. Also called Able Seamen and A.B.

The amount of energy (in electron volts) required to free an outer shell electron from its orbit about the nucleus to a free state, and thus promote it from the valence to the conduction level.

Double-Bottom

Warehouse Withdrawal for Transportation (WDT)Allows merchandise that has been withdrawn from a bonded warehouse at one port to be transported in bond to another port, where a superseding entry will be filed.

The quality, state or degree of being acid. In oils, acidity denotes the presence of acid-type constituents whose concentration is usually defined in terms of neutralization number.

Anemometer which generates an electrical contact output with a frequency proportional to wind speed.

Deals,battens an Boards.

Auxiliary Management Information System.

Association Internationale de Signalisation Maritime (see also IALA).

A unit of length named for A.J. Angstome, a Swedish spectoscopist, used in measuring electromagnetic radiation equal to 0.000,000,01 centimeters.

Annual Machinery Survey.

A recording pressure-tube anemometer in which the wind scale of the float manometer has been made linear by the use of springs, i.e. Dines anemometer.

Germanischer Lloyd (German Class Society)

Visual Display Unit

Autonomous Underwater Vehicle.

CodeInternational Code for the Construction and Equipment of Ships carrying Liquefied Gases in Bulk,IMO

The next grade above the beginning grade of ordinary seaman in the deck crew.

Boiler Heating Surface(combined)

Business Planning and Analysis Group.

In physics, the concept that as the speed of a moving fluid (liquid or gas) increases, the pressure within that fluid decreases. Originally formulated in 1738 by the Swiss mathematician and physicist Daniel Bernoulli, it states that the total energy in a ...