5
GPS operation
ViaMichelin Navigation X-970 is fitted with an SiRF Star III type GPS, the latest generation of GPS, which
works even in unfavourable reception conditions.
After selecting a destination and before the navigation instructions show your route, the GPS must have three
pieces of information to calculate the route: the position, direction of travel and speed. You may consult the
GPS status screen on your mobile device to follow the GPS signal acquisition. The time the GPS takes to
acquire this information varies depending on how much time has elapsed since the device was last used:
• your ViaMichelin Navigation X-970 has not been switched on for more than 24 hours (
“cold start”): in this
case the time needed to acquire satellite signals may be quite long (10-15 minutes), and the message
“Satellite detection. This may take several minutes” is displayed on the navigation screen
• your ViaMichelin Navigation X-970 has not been switched on for more than 4 hours (“
warm start”): GPS
reception may take several minutes (5 minutes) and the message
“Satellite signal acquisition in progress”
is displayed on the navigation screen.
• you switch on your ViaMichelin Navigation X-970 after switching it off a few minutes ago (“
hot start”):
satellite reception is almost immediate and navigation can continue.
GPS acquisition time also varies depending on the surroundings:
•
athermic windscreens: if your vehicle is equipped with an athermic windscreen, GPS reception may be slower.
•
car park / tunnel / building: satellite signals do not travel through walls, so you will not receive a GPS signal
if your device is in a building, car park, tunnel, etc.
• urban “canyoning”: reception will be slower in urban areas if buildings are high, streets narrow or there
are a lot of trees. Go to an open space to improve reception.
• weather conditions: in poor weather (heavy snow, etc.), GPS reception may take slightly longer.
For full details about the operation of your ViaMichelin Navigation X-970 and the GPS, download the full
manual and consult our online help (FAQ) at the ViaMichelin web site dedicated to GPS Navigation!
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