SINS

American

[sinz] / sɪnz /

noun

a gyroscopic device indicating the exact speed and position of a vessel, as indicated by differences in positions over a given period on a given course, as well as the direction of true north.

s(hip's) i(nertial) n(avigation) s(ystem)

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The three SINS, which check each other, dangle from the stable ceiling platform of the Ethan Allen's navigation center.

From Time Magazine Archive

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023