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azimuth circle

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azimuth circle

[′az·ə·məth ‚sər·kəl]
(design engineering)
A ring calibrated from 0 to 360° over a compass, compass repeater, radar plan position indicator, direction finder, and so on, which provides means for observing compass bearings and azimuths.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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References in periodicals archive
This gives the impression that the accuracy of Yahya's azimuth circle was that of a typical armillary sphere, like the very model used by him.
Ghazan Khan's astronomical innovations at Maragha observatory
3 represent a fragment of the device, where 1 is the rotor, 2 is the azimuth circle, 3 are the indicators of direction, where the angular scale has the origin of count (zero degree) pre-defined to the Southern pole.
A new detector for perturbations in gravitational field
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