trinib4l05

I just updated to 4.001 and 2012 quarter 3 maps. My gps was working good and then it went off route. Its about a mile off. Is there a way to recalibrate this? I tried resetting and same problem. Please help.

Hi i have a f900bt i just updated to 4.001 and the navigation worked great up until the second day i was driving and it goes off route. It shows im about a mile off from where im suppose to be. Is there a way to fix or recalibrate the gps location? Thanks