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An architectural design invented by Buckminster Fuller with a regular polygonal structure based on radial symmetry.

Category:Energy Terms

NEC

ACRONYM - National Electrical Code

Category:Sea Words

The size of the area comprising a watershed or river basin. Also called catchment area.

Category:Meteorology

See hook gauge.

Category:Meteorology

Average speed of recovery two shots of chain cable when three shots are submerged and freely suspended at commencement lifting (m/s)

Category:Technical Terms

PRS

Polish Register (Class Society)

Category:Abbreviations

A sturdy railing or elevated guard rail around the deck at the stern. also known as Pushpit

Category:Sea Words

Effective U.S. Control.

Category:Abbreviations

Descriptive treatment of fracture, especially in metals, with specific reference to photographs of the fracture surface. Macrofractography involves photographs at low magnification (< 25x); microfractography, photographs at high magnification (>25x)

Water vapor content of the air. See absolute humidity, dew point, mixing ratio, relative humidity, specific humidity.

Category:Meteorology

FRA

France (Flag)

Category:Abbreviations

PSI

Port State Initiative (U.S. Coast Guard)

Category:Abbreviations

The middle watch.

Category:Sea Words

A positive displacement air compressor which has no oil injected into the compression chamber for lubrication, cooling or sealing

Category:Sea Words

An anchor or weight, permanently attached to the sea floor, with a buoy going to the surface, used to hold the boat in a certain area.

Category:Sea Words

Supporting braces made into a right angle, used for strength when two parts are joined.

Category:Sea Words

Any boat built to certain standards or rules so that is like all others in the same class.

Category:Sea Words

HMS

Heavy Metal Scraps

Category:Abbreviations

The elevation of the water surface in a stream as measured by a river gauge with reference to some arbitrarily selected zero datum.

Category:Meteorology

Are those constituents in the suction gas that cannot be condensed to a liquid with the cooling medium available.

Category:Sea Words