The radio network "mountain rescue":

The Alps are a mass of a large area extending from
the Mediterranean to Switzerland, along the Italian border.
Because of the wide range of risks associated with various
mountain activities, entertainment mountaineering,
specialized networks have been set up to interconnect
people and rescue teams.

Accidents are very common in the mountains,
mostly falls, loss of orientation…

In high mountain, when an accident occurs it is often
not possible to prevent the rescuers with
a standard GSM phone, due to poor coverage
of the telephone network in mountains.

The radio becomes the only means of communication between the rescue teams and a group of people.

The radio repeaters operate on the VHF band (generally between 153 and 162 MHz).
They are usually located on very high places; it allows a wide coverage in the mountains.

The channel E (161.3 MHz) is ensured at all times by the rescuers whatever the region.
If there is a problem, simply send a selective call on the frequency: 21414 (a selective call is like a phone number) and explain if possible the problem.

Then you will be in direct contact with the rescuers and the nearest helicopter will carry the mission.

If you can’t explain the problem, your signal will be located either by triangulation, or by goniometry (technique using angles and distances) to determine a probable position (QTH).

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Here is the location map of the different radio repeaters :

 

 

 

 

 

 

 

 

 

 

 

 

 

This map shows us the repeaters range of the network:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

• The signal is more powerful in red areas.