Vehicle Position; Map Information And Database - Advent Navigation Owner's Manual

IGO primo software provides turn-by-turn visual and voice assistance to direct you
to your selected destination. The software quickly calculates step-by-step direc-
tions to any destination available on the included navigation map.
The IGO primo software uses Global Positioning System (GPS) satellites, and a
digital roadway map database to calculate and display travel directions. The sys-
tem's GPS antenna receives signals from a constellation of 24 satellites orbiting the
earth and uses the strongest signals to determine your position to within meters.

Vehicle Position

The IGO primo software's computer considers vehicle speed and heading changes,
together with longitude and latitude information, to accurately determine vehicle
heading and position on a digital map.
Signals from GPS satellites are used to determine the vehicle location. Three
(good) or four (best) satellites must be received to accurately determine location.
The GPS reception status is indicated by the GPS symbol on the map.
Map and Information Database
The map database used by your IGO primo software was created using
high-resolution aerial and land based data collection.
Car navigation maps are frequently updated. While the database was judged to
be as accurate as possible at the time of its release, a map database can never be
100% accurate. Road information that is maintained in the map databases, such as
turn restrictions or road names may change over time.
4