JohnnyM.'s Sextant Geocoin
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Owner:
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JohnnyM.
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Released:
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Sunday, November 22, 2009
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Origin:
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Hlavní město Praha, Czechia
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Recently Spotted:
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In the hands of the owner.
This is collectible.
Use TB35QJF to reference this item.
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To be in small collection of my owner.
I want to travel from event to event with my owner.
You can see me in the hands of JohnnyM. mostly stays in Prague (Czech Republic).
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.
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Tracking History () View Map
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Muggelmom discovered it
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Gesehen beim Giga-Event in Prag.
Danke fürs Teilen!
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jpavli discovered it
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seen and discovered on my first giga event in prague. tnx for showing
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toporki discovered it
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Widziany w Pradze na Giga
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MIDOUL discovered it
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🇨🇵🇨🇵🇨🇵 Thank for sharing from 🇫🇷🇨🇵🇨🇵
A Big GIGA, a Big GPS Maze, a Big Fest in Prague 2022
MIDOUL is very happy !!! Thank you !!!
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bentstor discovered it
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Set til giga event i Prag. Tak for kigget
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DVERK discovered it
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Auf unserer Tour zum GIGA in Prag oder zum MEGA GGE 2022 konnte ich diesen TB entdeckt. Danke fürs zeigen und teilen und weiterhin gute Reise. Lg Tom alias DVERK
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Zoya83 discovered it
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GeoTrotti discovered it
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Discovered in Prag during Giga Weekend!
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GeoTrotti discovered it
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PRAG war der Hammer... Endlich komme ich dazu, noch ein "paar" TBs zu discovern...
Some were discovered during GIGA weekend in Prague others seen in the hands of friends. I really enjoyed and very happy when I remember these days!
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Dariunee discovered it
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Seen at the maze in the GIGA event, thanks for showing!!
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