Here’s the device I’ve just invented - I call it Kobayashi’s Patented Mark ‘n’ Recall, based on fictitious technology. It’s shaped like the old Sinclair joystick (without the wire). Press the button once to ‘mark’ your location. Press it again anywhere else to return instantly to that location (Earth’s rotation, orbit etc are factored in - you won’t end up floating in space).
Just a couple of caveats - you have to be standing still or sitting still to recall. Anything you’re carrying - as long is it doesn’t touch the ground - will recall with you. Otherwise the button does nothing. You can’t override the mark, it’s permanent - though you can have multiple devices. They can be destroyed as easily as a joystick if you want to get rid of one; however they don’t run out of charge - as long as it’s intact it will work. I’m assuming they work on other planetary bodies but so far I’ve only tested it on Earth.
They’re easy to make and cost me next to nothing so I’ve been knocking them up in my garage and giving them away left right and centre to friends and well wishers. How long is it before somebody gives me a visit and tells me in no uncertain terms to knock it off?