This should be available in the year 2125 (if man is still alive)
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Geo magnetic fin keels! Be the first to ballast your boat with the earths own magnetic field!
(disclaimer)
1. For a small additional fee you can add or include Geo navigation! run with the crowd! (porpoise, penguins, salmon)
2 Solar flares may disrupt your otherwise stable ride.
3 Be advised that you should have additional ballast on board should the Geo magnetism become unstable.
4 earth bound comets, meteors, asteroids may impede your arrival date.
5 not compatible with sea talk, nema, or radar.
6 we reserve the right to add more disclaimers as research progresses.