Well. for the record... satellites don't recognize anything and know nothing about any GPS. It is the GPS that receives signals in the form of messages from the various satellites. In the simplest terms, satellites transmit their position and the time of day. Once the GPS can receive satellite position and time information from the transmitted messages of 3-4 different satellites it is able to triagnulate it's own position and that is totally independent of any maps you may have loaded. The purpose of the maps you have loaded is to help YOU make physical/relative sense of where you are currently located. Maps serve as references to your location.
For exmple: If you had maps of North America and Europe loaded and you were on a boat in the middle of the Atlantic, your GPS would show you located the middle of the ocean (empty blue space) and your loaded maps would be of no value except to let your know where you are relative to them.



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