Skip to Content


Listen to the Bells Reloaded

A cache by Saint-Nic Send Message to Owner Message this owner
Hidden : 01/03/2016
4 out of 5
1.5 out of 5

Size: Size: regular (regular)

Join now to view geocache location details. It's free!


How Geocaching Works

Please note Use of services is subject to the terms and conditions in our disclaimer.

Geocache Description:

Apprendre à la dure comment le GPS vous localise.
The tough way to learn how the GPS locates you.

Je me souviens, en ce temps là, le GPS n'existait pas. J'étais au milieu de nulle part et j'y ai mesuré ma position grâce au son des cloches des églises environnantes et d'un chronomètre. Pourriez-vous retrouver ma position ? Je peux reconnaître les cloches des églises de Sart-Dames-Avelines, Villers-la-Ville et Marbais. Toutes les cloches sonnent à midi à la milliseconde près. D'abord j'entends les cloches de Sart-Dames-Avelines. Après 1,645 secondes, j'entends les cloches de Villers-la-Ville. Finalement, 0,556 seconde après celles de Villers-la-Ville, j'entends les cloches de Marbais. La vitesse du son est de 340 mètres par seconde.

Position de l'église
  Church position  
Latitude N Longitude E
Sart-Dames-Avelines 50°34.096 4°29.536
Villers-la-Ville 50°34.648 4°31.788
Marbais 50°32.701 4°31.978

I remember those days there was no GPS. I was in the middle of nowhere and I measured my position thanks to the bell rings from the churches around and a chronometer. Could you find my position again ? I can identify the bells from the churches of Sart-Dames-Avelines, Villers-la-Ville and Marbais. All the bells ring at noon exactly within one millisecond accuracy. First I can hear the bells from Sart-Dames-Avelines. After 1.645 seconds I can hear the bells from Villers-la-Ville. Finally 0.556 second after the ones of Villers-la-Ville, I can hear the bells from Marbais. The speed of sound is 340 meters per second.

Additional Hints (Decrypt)

Obhyrnh / Ovepu

Decryption Key


(letter above equals below, and vice versa)

Return to the Top of the Page

Reviewer notes

Use this space to describe your geocache location, container, and how it's hidden to your reviewer. If you've made changes, tell the reviewer what changes you made. The more they know, the easier it is for them to publish your geocache. This note will not be visible to the public when your geocache is published.