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Nocturnal Geocoin 🧭 Nocturnal Geocoin

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team-bison66 Send Message to Owner Message this owner
Friday, 24 April 2020
Nordrhein-Westfalen, Germany
Recently Spotted:
In the hands of the owner.

This is collectible.

Use TB88BR1 to reference this item.

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Current Goal

Only to discover.

About This Item

Nocturnal Geocoin

This is a functional nocturnal coin which you can actually use to tell the time during the night and get your latitudinal deviation.

The nocturnal navigational tool stood the test of time. Its purpose is to tell time at night so you can gain a more accurate latitude and longitude reading. The first written evidence of a nocturnal was discovered in the year 1272. It was refined in the 1500s to tell more accurate time and was used well in to the late 1800s and partially used into the early 1900s. Two disadvantages of the Nocturnal is it can only be used at night, and only when the pole star Polaris and either of the dippers are visible. However, it also had a great advantage since it can be used at night when a sundial could not be used. The nocturnal can only be used in the northern hemisphere unless you know how to triangulate the southern axis point and align the correct stars, but the deviation scales can only be used in the northern hemisphere. Using a nocturnal in conjunction with a quadrant will yield a more accurate latitude reading. The use of a northern planisphere / southern planisphere is most helpful to find the correct stars to use.

Even though mechanical clocks have been around for several centuries, they could not keep accurate time on a ship that is pitching and rolling on the ocean waves. When an accurate chronometer good enough to be used at sea was invented and after it was able to be massed produced is when the nocturnal finally became obsolete.

More sophisticated nocturnals also listed tide charts and deviation gauges on its surfaces.

The early nocturnals were made of wood and later made in brass. They were approximately 7" to 10" in diameter plus the length of the handle and arm. The large circle, that has the handle attached to it, lists the days and months. The center rotating disk has the time. The arm has a notch on one edge of it so you know to use the opposite edge for lining it up with the stars. Both the center circle and arm rotate on an arbor which is hollowed out to use it as a sight.

The Nocturnal Geocoin™ is trackable on and has its own icon. It is specially designed to be held comfortably between your fingers when taking a reading, and is only currently available in antique bronze.

Go to for instructions on how to use this coin.

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Tracking History () View Map

  • 01-04 of 04 records ·
  • 01
Discovered It 12/22/2020 little-leggs discovered it   Visit Log

Discovered by " My eye's Only "
Thank you to
For sharing this one and some with Me here in sunny




Move To Collection 05/10/2020 team-bison66 moved it to their collection   Visit Log
Discovered It 04/27/2020 Killekalle discovered it   Visit Log

Im Status des Owners gesehen. Vielen Dank fürs Zeigen.

Discovered It 04/27/2020 PhilFeld273 discovered it   Visit Log

Diese Coin konnte ich heute beim Owner entdecken.
Es ist doch immer gut, wenn man einen Zeitmesser dabei hat. Mit dieser Coin kann der Owner nun sogar bei Nachtcaches unterwegs präzise die Zeit ansagen - ein tolles Tool.
Auch der Mechanismus zum Einstellen der Zeit auf der Coin sieht sehr interessant aus.

Danke an team-bison66 fürs Zeigen.
Viele Grüße!

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  • 01-04 of 04 records ·
  • 01

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