Headline should read "GPS - Autopilot coupled Cessna 172 flys 18 year old around the world." Does he know what an E6B looks like? Can he fold a paper chart?
OK Boomer...
Not sure why either of these are needed anymore. When I fly I have the panel in front of me, an iPad, and a phone. That's 2 backups to the built in. If that doesn't do it, having paper to manage and an E6B to manipulate, while gracefully dropping out of the sky, isn't going to help much.
I'm more concerned with someone that young understanding how long these sort of flights will be. Fatigue will kill you up there. A 172 is going to make that trip ridiculously long.