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Sextant a sextant a sextant is a doubly reflecting navigation instrument that measures the angular distance between two visible objects A sextant’s main use is to measure the angle that separates a celestial body—like the sun, moon, or stars—from the horizon The primary use of a sextant is to measure the angle between an astronomical object and the horizon for the purposes of celestial navigation.
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Sextant, instrument for determining the angle between the horizon and a celestial body such as the sun, the moon, or a star, used in celestial navigation to determine latitude and longitude. A sextant is a precision optical instrument used primarily in maritime and celestial navigation In modern usage the term is applied to all modern.
In marine navigation, when a navigator measures the altitude of a celestial body with a marine sextant he has to measure the altitude as an angle of the body above the visible horizon
(click on the picture to enlargen.) the altitude thus obtained has to be corrected for instrument and other errors before calculations can be made The marine sextant the sextant derives its name from the extent. A sextant is a marine navigation instrument used to measure the angle between two objects Learn everything about sextants in this article.
