That horizontal wind velocity at which the Coriolis acceleration exactly balances the horizontal pressure force. It is directed along contour lines or isobars.

A unit of energy defined as the heat required to raise the temperature of one pound of water one degree Fahrenheit. It is equal to 252.1 calories or to 1055 joules.

Specially designed for the transport of condensed (liquefied) gases. The most important gases are: ammonia, ethylene, LNG (Liquefied Natural Gas), which consists mainly of methane, and is cooled to a temperature of minus 163 degrees Celcius, and LPG (Liqu ...

The approximate energy producing capacity of a power plant, under specified conditions, usually during periods of highest load.

Atmospheric pressure as measured by a barometer.

A locker big enough to hang clothes.

A rain gauge capable of measuring very small amounts of precipitation. Also called micropluviometer, trace recorder.

Owners or operators of vessels providing transportation to shippers. The term is also used to refer to the vessels.

A thermometer which uses a transducing element whose element proper-ties are a function of its thermal state. Common meteorological examples of such thermometers are the resistance thermometer and the thermoelectric thermometer.

Dynamic positioning

Abbreviation for "With Particular Average."

Non-Transportation Use

Capable of keeping out water.

Small staysail located between the foremast and mainmast.

A note, issued to a person or company indicating an amount.

An economic situation in which there is a general fall in the level of.

Hoisting the ensign at 8 a.m. and down at sunset.

NEXt Generation RADar. A NWS network of about 140 Doppler radars operating nationwide.

The chemical or electrochemical reaction between a material, usually a metal, and its environment that produces a deterioration of the material and its properties.

See calorie.