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pounds per square inch absolute.

Related Terms

PSID

pounds per square inch differential.

PSIG

pounds per square inch gauge (PSIA - 14.696).

ATMOSPHERIC PRESSURE

Pressure exerted by the atmosphere at any specific location. (Sea level pressure is approximately 14.7 pounds per square inch absolute.)

psi

pounds per square inch.

ICE ISLAND

A large piece of floating ice showing about 5 meters above the sea surface, which has broken away from an ice shelf, having a thickness of 30 to 50 meters and an area of from a few thousand square meters to l50 square nautical miles or more; usually characterized by a regularly undulating surface which gives it a ribbed appearance from the air.

MOMENT OF INERTIA

The quantity obtained by multiplying the mass of each small part of a body by the square of its distance from an axis, and adding all the results.

CLEW

The lower corners of square sails or the corner of a triangular sail at the end of the boom.

SWIMMIE

A barge with a square overhanging bow, like a swimhead lighter. aka muffies.

BUNTLINE

A rope attached to middle of square sail to haul it up to the yard

BLUEPETER

A blue flag with white square in centre used as ship's signal
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