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A small square sail set on the bowsprit.

Related Terms

BOLTROPE

A strong rope stitched to edges of a sail

PSID

pounds per square inch differential.

HORIZON SYSTEM OF COORDINATES

A set of celestial coordinates based on the celestial horizon as the primary great circle; usually altitude and azimuth or azimuth angle.

PSIG

pounds per square inch gauge (PSIA - 14.696).

AUXILIARY CONTACTS

A set of contacts that perform a secondary function, usually in relation to the operation of a set of primary contacts.

ATMOSPHERIC PRESSURE

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

FORESAIL

The lowest sail set on the foremast of square-rigged ship

FORESAIL

The lowest sail set on the foremast of square-rigged ship

psia

pounds per square inch absolute.

psi

pounds per square inch.
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