Alpine Navigation Radio Owner's Manual Page 16

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14-EN
About car positional accuracy on initial use
Accurate Gyroscope/Speed sensor performance is not possible first
without accumulating driving some data.
The car position may not be correctly displayed after initial installation
of the system without inputting information about any previous changes
(exchanging the tire, etc.).
The error margin between sensor information and GPS data (as
calculated from the vehicle position) is continuously analyzed/revised,
resulting in a gradual increase in system accuracy.
A measurement is constant even if GPS signals cannot be received
avoiding the “filling of the gap” that occurs in running only the Gyro
sensor.
Navigation Terminology
Navigation
The navigation system displays and tracks the vehicle’s position and
movement on a moving map display. When a destination is input, the
navigation system quickly calculates a route and guides you along the
route with pictorial displays and voice prompts.
Present Vehicle Position
The present vehicle position is indicated by an arrowhead within a circle
Map matching
Since GPS navigation has an error window of about 30 m - 200 m, the
position of your vehicle may be calculated in such a way that it is
displayed incorrectly off the road. Map matching automatically corrects
this error so that the position is displayed on the road.
Destination
The point on the map that is your destination is specified and displayed
with the destination icon.
You can set up a destination and 4 waypoints for the same journey.
Route
When a destination is input, the navigation system automatically
calculates a route and displays it in blue on the map
Address book
Locations you go to frequently can be stored into address book and
marked on the map. The system can store up to 200 points. You can add
icons at the marking locations so that the system also displays the icons
on the map.
Motorway-preference selection
When searching for routes with the navigation system, you can switch
between searching for routes that give priority to motorways and those
that give priority to ordinary roads. When you specify motorway
preference, the navigation system automatically searches for a route that
gives priority to motorways and guides you along that route.
Present vehicle position
Route (Blue)
Destination icon
Mark
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