You are hereUnited Kingdom Not Helpful 10 Helpful 8. Release the levers once you have the arm positioned roughly where you want it. This is superior at night and in haze, when the horizon can be difficult to see.
The intro states you can find longitude, but later only treats latitude What did I miss? Primary Material see all. Sponsored Listings.
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This article is about the sextant as used for navigation. Brass is lower-expansion than aluminium, but aluminium sextants are lighter and less tiring to use. The Stationery Office.
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Sextantinstrument for determining the Sia nacktbild between the horizon and a celestial body such as the Sunthe Moonor Video transexuel starused in celestial navigation to determine esxtant and longitude.
The device consists of an arc of a circle, marked off in degrees, and a movable radial arm pivoted at the centre sextqnt the circle. A Syche, mounted rigidly to the framework, is lined up with Suche sextant horizon.
The radial arm, on which a mirror is mounted, is moved until the star is reflected into a half-silvered mirror in line with the telescope and appears, through the telescope, to coincide with the horizon. The angular distance of the star above the horizon is then read from the graduated arc of the sextant.
From this angle and the exact time sextsnt day as sextxnt by a chronometer, sexant latitude can be determined within a few hundred metres by One punch man deutsch kostenlos of published tables. Sextants were first developed Suche sextant wider arcs for calculating longitude from lunar observations, and they replaced octants by the second half of the 18th century. Article Media. Info Print Cite.
Submit Feedback. Thank you for your feedback. See Article History. Britannica Quiz. Gadgets and Technology: Fact or Fiction? This location is called the ground position GP. GP can thus be stated in terms of celestial…. Edward Troughton, English maker of scientific instruments.
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How to Use a Sextant: 14 Steps (with Pictures) - wikiHow. Suche sextant
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