Mariner's Astrolabe Geocoin MilanoXX's Mariner's Astrolabe Geocoin

Trackable Options
Found this item? Log in.
Print Info Sheet
Owner:
milanoxx Send Message to Owner Message this owner
Released:
Wednesday, December 16, 2009
Origin:
Středočeský kraj, Czechia
Recently Spotted:
In the hands of the owner.

This is collectible.

Use TB32GNQ to reference this item.

First time logging a Trackable? Click here.

Current Goal

Mince bude navštevovat hezká místa a eventy. Od majitele se nehne ani na krok :)

About This Item

Mariner's Astrolabe

This huge geocoin is a working replica of a Mariners Astrolabe. The mariner's astrolabe, also called sea astrolabe, is not a proper astrolabe, but rather a graduated circle with an alidade used to measure vertical angles. In the sixteenth century, the instrument was also called a ring.

The mariner's astrolabe would have replaced or complemented instruments such as the cross staff or quadrant as a navigator's instrument. The mariner's astrolabe was used until the middle or, at the latest, the end of the 17th century. It was replaced by more accurate and easier-to-use instruments such as the Davis quadrant. In order to use the astrolabe, the navigator would hold the instrument by the ring at the top. This caused the instrument to remain in a vertical plane. He would align the plane of the astrolabe to the direction of the object of interest. The alidade was aligned to point at the object and the altitude was read off the outer degree scale.

How to use mariners astrolabe:

Taking a latitude reading from the North Star Polaris: 

1. Grasping the ring, hold the astrolabe up in the air towards the North Star.

2. Line up the holes in the spinning alidade so that you can see Polaris through them.

3. Take the reading from the degree scale and you now have your latitude.

Gallery Images related to MilanoXX's Mariner's Astrolabe Geocoin

View 1 Gallery Image

Tracking History (335.3mi) View Map

Discovered It 10/28/2011 drakulam discovered it   Visit Log

tak jsem jeskyni nkonec nasel a mriz drzi tak jsem alespon neco vyfotil
rad bych ho videl v realu
Discovered It 8/18/2011 PepeK-CZ discovered it   Visit Log

Take se nedivim, ze takovy krasny GC neda majitel z ruky. Tak alespon takhle pres fotku. Diky za pozvani k jeskyni, kde jsem kdysi s tatikem byl, ale od te doby cestu nenasel. Ono i ted jsem si spatne zapamatoval popis v "Tiche poste" a prodlouzil si cestu o sestup do udoli a pak zase zpatky. Jo, co neni v hlave, musi byt v nohou..
Discovered It 6/25/2011 Vacerman discovered it   Visit Log

V reálu jsem tento pekný GC videl asi pred rokem na eventu, dneska v 18:40 pri ceste okolo jeskyne Krtola GC "navštíven na dálku".
Discovered It 5/29/2011 mikelord discovered it   Visit Log

Pekná vecicka, škoda, že jsem se s ní nemohl pomazlit. Ale chápu, taky mám doma v šuplícku 😉
Discovered It 4/30/2011 adam 2004 discovered it   Visit Log

Krásná práce, taky se nedivím že hezky leží doma u majitele :o). Díky za ukázku jeskyne, dlouho jsem ji marne hledal a díky této keši se konecne zadarilo!
Discovered It 4/9/2011 marfik discovered it   Visit Log

Nedivím se, že owner takový coin nedá z ruky, vypadá fakt pekne.
Discovered It 3/18/2011 palook discovered it   Visit Log

Discover bez nálezu keše.
Dnes jsem byl pracovne v jeskyni ale souradnice keše jsem s sebou nemel. U jeskyne jsem však tento bunus našel ješte pred odemcením. Škoda, že jsem ten pekný kousek nepotkal osobne.

Jinak moje varování ohledne keše stále platí. Kolegové z CSOP jsou na "krabicky" a tímpádem i zvýšený provoz u cenných lokalit velmi citliví.
Discovered It 1/15/2011 bikerka discovered it   Visit Log

Nalezeno ihned. Pekný kousek.:-)
Retrieve It from a Cache 12/18/2010 milanoxx retrieved it from eMBEcko (aneb Maly Boleslavsky Eventek) IV Středočeský kraj, Czechia   Visit Log

Po tradicním mladoboleslavském eventu pokracujeme s majitelem zase nekam dál..
Dropped Off 12/17/2010 milanoxx placed it in eMBEcko (aneb Maly Boleslavsky Eventek) IV Středočeský kraj, Czechia - 40.44 miles  Visit Log
data on this page is cached for 3 mins