I am trying to mark my property line. I have found all the pins, but some of them are over 1000 feet apart. The property is wooded and has a slight rise in the center of it. This makes it impossible to see from one pin to the other. If I could mark a waypoint at a pin and walk to the other, then track my way back to the waypoint in a straight line I'd be able to mark my property line. I need an accurate gps to do this and this is the only thing I need this gps for, as I have car gps. Thanks for your help