AZ4ST Cross Staff -Back Staff Geocoin
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Owner:
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AZ4ST
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Released:
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Wednesday, January 7, 2009
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Origin:
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Arizona, United States
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Recently Spotted:
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Unknown Location
The owner hasn't set their collectible preference.
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We would like this coin to travel many miles, to many caches. PHOTOS UPLOADED FROM IT'S TRAVELS GREEATLY APPRECIATED! Once it's covered a lot of ground, I'd love to retrieve it in a few years, THANKS!
A very early navigational instrument, the cross staff was widely used among surveyors and astronomers. It was not until the 1500s after it was developed further that it started to be used at sea.
The name is derived from its cross shape. It was cumbersome to use simply because a user had to focus on the horizon and star or sun at the same time; moving your eyes from one to the other and at the same time sliding the transversal (cross piece) until you achieved what you thought would be an accurate reading. It also required looking straight into the sun when taking daytime readings. It was with the invention of the back staff that these problems would be resolved.
John Davis invented a back staff in 1595 and his improved design became known as the Davis Quadrant. It rendered the cross staff obsolete since the user only had to take a sight at one object and didn't have to look at the sun to take a reading. Appropriately named, its basic design is like a cross staff, but with some enhancements, and daylight readings were taken by having your back towards the sun. In many cases, John Davis's invention ended up replacing not only the cross staff, but also the mariner's astrolabe and quadrant. It was in the late 1700s when the octant and sextant became the new preferred tools over the back staff.
Gallery Images related to AZ4ST Cross Staff -Back Staff Geocoin
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Tracking History (17969.5mi) View Map
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AZ4ST marked it as missing
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The owner has set this Trackable as missing.
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wellwill posted a note for it
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Heute leider nicht im Hotel GC1BX8Z gesehen 😟
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Lillebee posted a note for it
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Leider nicht im Cache TB/Coin Box an der B4 gesehen.
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FRIEDEL09 posted a note for it
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I didn't see "AZ4ST Cross Staff -Back Staff Geocoin" during my visit at "TB/Coin-Box an der B4" today.
I'm very sorry, someone must have taken it without logging.
Friedel09 from germany
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FRIEDEL09 placed it in TB/Coin-Box an der B4
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Niedersachsen, Germany
- 404.17 miles
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Good jouney and thanks for your company the last days.
Farewell.
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FRIEDEL09 took it to Graf Stahl
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Niedersachsen, Germany
- 1.71 miles
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A tour by bike and a Cache near the "Elbe-Seiten-Kanal" Channel. The "Cross Staff -Back Staff Geocoin" visited this building.
Greetings - with a foto - to AZ4ST in Arizona
from Friedel09
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FRIEDEL09 retrieved it from High Fidelity
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Niedersachsen, Germany
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Today on my 45.7 km tour by bike together with my wife, I found this precious Coin in the Cache "High Fidelity" near the city of Uelzen, Lower Saxony, Germany.
I'll take care of it for a while and then send it further.
Greetings to the owner at Arizona, USA.
Yours Friedel09
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fotomike placed it in High Fidelity
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Niedersachsen, Germany
- 4.18 miles
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fotomike grabbed it
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Hello! Yesterday I met Aestiva and he gave me this nice coin. Will drop it soon in a cache nearby.
[blue]Greetings from [b]fotomike[/b] 🙂[/blue]
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Aestiva retrieved it from Oldenstädter See
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Niedersachsen, Germany
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Nice Coin. I should have found it earlier when I joined the navy.
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