Acquiring GPS signals
When you turn on your navigation device, the GPS receiver must collect satellite data and establish the current location. 
in the status bar indicates the satellite signal strength. The time required to acquire satellite signals varies based on several factors, including how far you are from the location where you last used your navigation device, whether you have a clear view of the sky, and how long it has been since you last used your navigation device. The first time you turn on your navigation device, it may take several minutes to acquire satellite signals.
- Turn on the device.
- Wait while the device locates satellites.
- If necessary, go outdoors to an open area, away from tall buildings and trees.
When turns green, the device has acquired satellite signals and is ready for navigation.