Technology is crazy. Have you heard of inReach or SPOT? They make GPS tracking devices for adventurers ranging from hiking enthusiasts to Bear Grylls-level explorers. We're somewhere in the middle of that (side note: I like to think that I'll have some adventures that push towards the latter end of that spectrum during my life. One can only hope). Outside of the family check-in ability and the SOS/mount-an-international-rescue option, there's also a fun, handy-dandy, pin-drop map ability. You'll see what I mean:
Any time we drop a pin, it will show up on this map here. It's unclear whether or not a pin fades after 7 days - so that may or may not happen.