I am unsure on the 500 but if it is like other gps units it will make a straight line from your current position to the start of the track. Alternatively if you know this is going to be the case make a new track to the start of the original track or easier still make a complete new track using bikely, ridewithgps, garmin connect etc.etc. etc.
I am unsure on the 500 but if it is like other gps units it will make a straight line from your current position to the start of the track. Alternatively if you know this is going to be the case make a new track to the start of the original track or easier still make a complete new track using bikely, ridewithgps, garmin connect etc.etc. etc.