Moody, Capt. Alton B. Formerly, Navigation Consultant, San Diego, California.
Last reviewed:June 2020
- Sextant altitude corrections
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A navigation instrument used for measuring angles, primarily altitudes of celestial bodies. Originally, the sextant had an arc of 60°, or one-sixth of a circle, from which the instrument derived its name. Because of the double-reflecting principle used, such an instrument could measure angles as large as 120°.
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