If i buy a navigation system, do ihave to pay some type of monthly subscription to use the gps satellite?

No not at all. The GPS satellites are always on. Once you buy the hardware, it costs nothing to use them.





To address the answer below... the GPS satellites were launched and are supported by the government for military purposes. So our taxes have already paid for it.|||Check with the dealer.





I doubt they are going to provide free service after spending all that money to operate the satellite. Then again, I could be wrong.