Ren
Senior Member
What about collecting the GPS data from another dimension?
Navigating time and space would need an UNIVERSAL coordinates system, with precision down to a millimeter for spacial coordinates, and to a millisecond for time coordinates. You can't just travel thru time without displacing yourself thru the 3D universe. So all you need is to map the entire universe from the big bang up to the end of the universe. Easy stuff...
We can start with just our solar system. John didn't say he ventured beyond earth.
I've already thought of UPS (Universal Positioning System): Universal Positioning System
That must be why AlexanderTT had to check his displacement unit. It was still on. And he was getting his GPS coordinates from 2038 on this worldline/timeline.