azimuth instrument

azimuth instrument

[′az·ə·məth ‚in·strə·mənt]
(engineering)
An instrument for measuring azimuths, particularly a device which fits over a central pivot in the glass cover of a magnetic compass. Also known as azimuth bar; bearing bar.
References in periodicals archive ?
49) Muhyi 1-Din al-Maghribi traced the use of an azimuth instrument in the Islamic period even further back, ascribing it to Yahya b.