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sky compass

American  

noun

Navigation.

  1. a device for taking a bearing by means of polarized sunlight when the sun is invisible.

Example Sentences

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When used with the proper tables, the sky compass gives the direction in which the plane is flying.

From Time Magazine Archive

One gadget it has found useful is the Pfund� sky compass which polarizes light reflected from the sky�and points to the spot on the horizon directly above the invisible sun.

From Time Magazine Archive

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

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.