Antique Brass Pocket Sextant Navigation Nautical Marines Sextants Vintage Box For Sale
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Antique Brass Pocket Sextant Navigation Nautical Marines Sextants Vintage Box:
$31.05
The primary use of a sextant is to determine the angle between an astronomical object and the horizon for the purposes of celestial navigation.
The determination of this angle, the altitude, is known as sighting (or shooting) the object, or taking a sight. The angle, and the time when it was measured, can be used to calculate a position line on a nautical or aeronautical chart.
Common uses of the sextant include sighting the sun at solar noon or Polaris at night (in the Northern Hemisphere) to determine latitude. Sighting the height of a landmark can give a measure of distance off and, held horizontally, a sextant can measure angles between objects for a position on a chart.[1] A sextant can also be used to measure the lunar distance between the moon and another celestial object (such as a star or planet) in order to determine Greenwich Mean Time and hence longitude.
Dimensions;
This is a 3 Inch Sextant with a 4 Inch box
Sextant 7.5cm Length 7.5 cm Width 4 cm Depth
Box 9Length 9 cm Width 8 cm Depth
Please note there may be some slight variation in the colour of the box due to wood being a natural product and once stained or varnished they come up slightly lighter or darker that that shown in the picture, the sextant is exactly the same.
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