My iWay 350C started behaving strangely after 2 months of extensive usage. At some point during navigation mode, you could see your trail on screen out of the highway, 200 yards off somewhere in the woods. IWay was constantly navigating, calculating routes new maps and newer ending seek for position. Finally it broke! When I restart device, it shuts down immediately afterwards. I will be calling Lowrance customer service tomorrow, press 1 press 2, press 3, press 4 .....