The only times I have made significant route finding mistakes in the last ten years were after I started using a GPS for route finding - in both cases I took th

The only times I have made significant route finding mistakes in the last ten years were after I started using a GPS for route finding - in both cases I took the wrong ridge down from a peak. My wife was also in a group that managed to descend completely the wrong side of a mountain the first time the person leading used a GPS...