sextant altitude

sextant altitude

[′sek·stənt ‚al·tə‚tüd]
(navigation)
Altitude as indicated by a sextant or similar instrument before corrections are applied.

sextant altitude

sextant altitudeclick for a larger image
The altitude of a celestial body as measured by a sextant. It is the angle measured in a vertical plane between an artificial or sea horizon and a celestial body, without application of any corrections.
References in periodicals archive ?
The module introduces the relationship between celestial and Earth coordinates and examines key celestial navigation parameters-geographic position, sextant altitude, observed altitude, azimuth, and computed altitude.