It was outstanding tracking skills that likely saved this woman's life, although her story is amazing too. To track someone for 26 miles in heavy snowfall, wow! Sounds like another near another death from misapplied GPS. It is a wonderful tool, but over reliance and misunderstandings is killing people by directing them onto unmaintained summer only roads. I suspect in many of these incidents the GPS users had the device set on shortest path, with the device algorithms failing to identify an only seasonal route. The devices accuracy on major roads and highways is typically outstanding, logging, recreational and fire roads very questionable.