Global Positioning System; Vehicle Positioning - Vauxhall Ampera Infotainment Manual

72 Navigation
12 hours / 24 hours format: Select the
12 hours screen button for standard
time; select the 24 hours screen
button for military time.
Day + or Day -: Press the Day + or
Day - display buttons to increase or
decrease the day.
Display: Press the Display screen
button to turn the display of the clock
on the screen on or off.

Global Positioning System

The position of the vehicle is
determined by using satellite signals,
various vehicle signals and map data.
At times, other interferences such as
the satellite condition, road
configuration, the condition of the
vehicle and/or other circumstances
can interfere with the navigation
system's ability to determine the
accurate position of the vehicle.
The GPS shows the current position
of the vehicle using signals sent by
the GPS Satellites. When the vehicle
is not receiving signals from the
satellites, a symbol appears on the
map screen. Symbols overview 3 57.
This system might not be available or
interferences can occur if any of the
following is true:
■ Signals are obstructed by tall
buildings, trees, large trucks or a
tunnel.
■ Satellites are being repaired or
improved.
For more information if the GPS is not
functioning properly, see Problems
with route guidance 3 73 and
Service of the navigation system
3 73.

Vehicle positioning

At times, the position of the vehicle
could be inaccurate due to one or
more of the following reasons:
■ The road system has changed.
■ The vehicle is driving on slippery
road surfaces such as in sand,
gravel and/or snow.
■ The vehicle is travelling on winding
roads or long straight roads.
■ The vehicle is approaching a tall
building or a large vehicle.
■ The surface streets run parallel to a
freeway.
■ The vehicle has been transferred
by a vehicle carrier or a ferry.
■ The current position calibration is
set incorrectly.
■ The vehicle is travelling at high
speed.
■ The vehicle changes directions
more than once or when the vehicle
is turning on a turn table in a parking
lot.
■ The vehicle is entering and/or
exiting a parking lot, garage or a lot
with a roof.
■ The GPS signal is not received.
■ A roof carrier is installed on the
vehicle.
■ Tyre chains have been installed.
■ The tyres are replaced or worn.
■ The tyre pressure for the tyres is
incorrect.