Sextant Geocoin
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Owner:
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rsmdragon
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Released:
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Saturday, February 26, 2011
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Origin:
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Oregon, United States
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Recently Spotted:
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In the hands of the owner.
This is not collectible.
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The Sextant Geocoin™ is a commemoration to the sextant. The octant and sextant replaced most of the earlier navigation tools in the late 1700s such as the back staff, mariner's astrolabe, and quadrant. The octant is 1/8 of a circle and a sextant is 1/6 of a circle. The sextant allowed for more range in the degree scale over the octant. The biggest improvement the sextant made over all other sighting tools (except the octant) is its double reflecting mirrors which eliminated the ocular parallax other tools caused. It also allowed for greater accuracy by having finer degree adjustments. The sextant design is so universal and accurate that it is still used on ships today as a backup instrument to electrical navigation devices. Even aircraft used these as backups if their avionic systems failed. It is made of antique bronze with having a second polished plating on the sextant. There is also text going around the edge of the coin. A unique feature about this coin is the stars around the sextant glow in the dark.
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