The envelope of air surrounding the earth and bound to it more or less permanently by virtue of the earth's gravitational attraction. The system whose chemical Properties. dynamic motions, and physical processes constitute the subject matter of meteorolog ...

A gun used in the life-saving services to throw a life line to a ship in distress or from ship to shore and used when a boat cannot be launched.

An evaluation, according to set procedures, of those weather elements which are most important for aircraft operations. Always includes cloud height or vertical visibility, sky cover, visibility, obstructions to vision, certain atmospheric phenomena, and ...

Not Otherwise Enumerated.

The vertical barrel device used to heave in cable or lines.

On square-rigged ships, a form of ceremonial salute to honor the visit of a high official. The yards were lined by men standing upon them, and there was also a man standing on the truck of each topgallant mast.

Same as freezing point.

A process involving conjoint corrosion and cavitation.

The purchase of a call with a high strike price against the sale of a call with a lower strike.

Navy term meaning Officer of the deck.

The greatest distance at which it is just possible to see and recognize with the unaided eye (1) in the daytime, a prominent dark object against the sky at the horizon, and (2) at night, a known, preferably unfocused, moderately intense light source.

A rotation anemometer in which the axis of rotation is horizontal. The instrument has either flat vanes (as in the air meter) or helicoidal vanes (as in the propeller anemometer). The relation between wind speed and angular rotation is almost linear.

The total price to move cargo from origin to destination, inclusive of all charges.

Cracking that occurs in the weld metal. See also cold cracking, hot cracking, lamellar tearing, and stress-relief cracking.

A unit of power equal to 1 billion Watts; 1 million kilowatts, or 1,000 Megawatts.

Geographic Information System

Officer of the deck

Instrument for establishing the altitude and azimuth of stars and planets.

See Ship's Port Agent

The downward facing structural element that is directly opposite the floor.