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by cynical_spar 436 days ago
This is not correct. There is no hard requirement for GPS nor anything that requires “something that transmits its location”. There is also no requirement for a flight plan or communication with ATC.

I can take off from an uncontrolled airport with no GPS, no transponder, no plan, and no radio and as long as I’m in the correct airspace I’m completely legal and within my right to do so.

There are some differences with these rules through out the world.