[LonePalm]

GPS uses the same 3+ circles intersecting to find location as Celestial Navigation. They just do it with time differential rather than object altitude and Ground Position.

WWG1WGA

Garde la Foi, mes amis! Nous nous sommes les sauveurs de la République! Maintenant et Toujours!
(Keep the Faith, my friends! We are the saviors of the Republic! Now and Forever!)
LonePalm, le Républicain du verre cassé (The Broken Glass Republican)

[TruthWillWin]

I was just saying that VOR would not be a way to navigate on the ocean, it is a short range land based navigation method.