2006 Ford Expedition Owner Guide 2nd Printing (Spanish) - Page 476

Entertainment Systems Navigation screen display When in navigation mode, there will be various indicators on the screen to help you in operating your system. 1. Direction to destination 2. Distance to final destination 3. Estimated time to destination 4. Current directional heading and GPS signal strength (color) 5. Vehicle icon (current vehicle position) 6. ZOOM 7. PAN 8. DETOUR 9. VOICE Principles of GPS (Global Positioning System) operation Your Vehicle Navigation System directs you based on information derived from satellites, road maps stored on the CD, sensors in your vehicle and the desired destination. The system compiles all necessary information to guide you to your selected destination. Space satellites determine the vehicle's current location and transmit position and time signals to your car. If the vehicle has been parked for a long period of time, the navigation function may be temporarily unresponsive. The navigation system will operate reliably again once GPS reception is available in a few minutes. Limited GPS reception System performance may be adversely affected if GPS reception is interrupted or interference occurs over a distance of several miles. The following are possible causes for GPS reception being interrupted. If the vehicle is: • in multi-story parking garages • in tunnels and under bridges • in between high buildings • by forests or tree-lined avenues • in heavy rain showers and thunderstorms • in valleys and in mountainous regions 68 2006 Expedition (exd) Owners Guide (post-2002-fmt) USA (fus)