Glad they are OK.
I am a BIG fan of what personal locator beacons can do, and I heartily recommend folks heading into wilderness bring one along. They are so cheap and simple to use today.
As I've said before here, I am big believer in people going into wilderness bringing a good paper map of the area, a compass, and a GPS (even a very basic one will do) ... and KNOWING how to use them together.
They have to know how to take a waypoint from the GPS and find it as a coordinate on the map, so they know where they are. For this I like
https://maptools.com/ tools and tutorial.
If they can know exactly where they are, often just using the compass can help them know the correct directions when faced with a choice.