Jaguar Touch Screen Display JJM 18 42 26 701 - Manual (Page 54)

Navigation - Overview
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How the System Works
The system uses signals from the Global
Positioning System (GPS) satellites,
which allow the approximate position of
the vehicle to be calculated. This is
combined with information from vehicle
sensors and data from the Navigation
System DVD to establish the true vehicle
position.
GPS signals are highly directional and
reception may occasionally be
interrupted.
Some examples of situations likely to
cause problems are shown below:
• Inside tunnels.
• Inside buildings.
• Roads under raised highways.
• Densely tree-lined roads.
• Forest roads between mountains.
• Between tall buildings.
• Roads under cliffs.
• Metal objects placed on the rear
parcel shelf.
• Having the vehicle windows tinted
using metal oxide tinting. Non-metal
tinting should be used.