Sextant Geocoin JohnnyM.'s Sextant Geocoin

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Owner:
JohnnyM. Send Message to Owner Message this owner
Released:
Sunday, November 22, 2009
Origin:
Hlavní město Praha, Czechia
Recently Spotted:
In the hands of the owner.

This is collectible.

Use TB35QJF to reference this item.

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Current Goal

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).

About This Item

JohnnyM.'s Sextant Geocoin

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.

Gallery Images related to JohnnyM.'s Sextant Geocoin

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Tracking History () View Map

Discovered It 9/1/2012 Filip Pecha discovered it   Visit Log

videno na mega moravia 2012
Discovered It 9/1/2012 miklust discovered it   Visit Log

CZ: viden na Mega Moravia 2012 - diky!

EN: seen at Mega Moravia 2012 - thanks!
Discovered It 9/1/2012 Aranyafëa discovered it   Visit Log

Videno na Mega Moravia 2012.
Discovered It 9/1/2012 Coare discovered it   Visit Log

I discovered It in mega event Mega Moravia in Olomouc 2012
Discovered It 9/1/2012 kanape cz discovered it   Visit Log

Viden v CAGeo Létajícím cirku na Mega Moravia 2012, všechny tyto navigacní geocoiny se mi moc líbily.
Discovered It 9/1/2012 A.L.I.C discovered it   Visit Log

Spatreno na MegaEventu 2012. Díky.
Discovered It 9/1/2012 crissar discovered it   Visit Log

MEGA MORAVIA:
1 weekend full of impressions
1 weekend full of caches
1 weekend full of events
and your trackable right in the middle of this.
Thank you that I was able to see it.
Discovered It 9/1/2012 RobinOK discovered it   Visit Log

Viden na eventu MegaMoravia 2012. Díky.
Discovered It 9/1/2012 washa4 discovered it   Visit Log

Diky za ukazku dalsi mince, ktera se typove do teto sbirky taktez hodi! Minci jsme mel moznost videt na MegaMoravii ve Velke Bystrici nedaleko Olomouce! Jeste jednou diky za ukazku sbirky, ktera svemu majiteli jiste dela cest!
Discovered It 9/1/2012 Kendar05 discovered it   Visit Log

Videno na Megaeventu. Díky.
Seen on Megaevent. Thanks.
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