If she’d had a compass and the most minimal knowledge”
Now that’s Funny, Just Yesterday I stopped at the top of the hill on the way home (Angeles National Forest) in California. The Pacifico Mountain Trail crosses the highway there.
I witnessed 5 Hikers in a row, within about 15 minutes, get to the road, pull out their phone and begin walking the WRONG WAY for about 100 yards until their stupid GPS told them to TURN AROUND!!!
I learned to Properly read a MAP and Navigate at 8 years old!!
A phone is not at all rugged enough for hiking. Yes, most phones have a GPS receiver but they are only designed to navigate you to the store and back.
Get yourself a good GPS unit. And even a basic unit that pinpoints your location so that you can look it up on a map.