While continuing to look for a better Android phone GPS app I was reading a few articles on how to get unlost while on the Appalachian trail. I've never been there, but it sounds like it could be confusing and very bad news if not resolved.

I think of the woman who got off the trail, made camp waiting for help, and died, and not found for many years. Would a GPS have helped her (assuming she didn't set a trail waypoint before stepping off trail to attend to "nature's call".

I doubt that sure current trail GPSes have sufficient resolution to show on/off such a trail.