azimuth circle

noun

a device for measuring azimuths, consisting of a graduated ring equipped with a sighting vane on each side, which fits concentrically over a compass.

First recorded in 1585–95

Case three, where direction is given by the azimuth-circle, and elevation by the quadrant or arc.

The mean of all the readings of the verniers gives the reading on the azimuth circle corresponding to the magnetic meridian.

An arc of the horizon intercepted between the azimuth circle of a celestial object and the magnetic meridian.

April 19, 2024tortuous

[tawr-choo-uhs ]

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