aGPS...How do I know if its working?

[Yankees368]

Can someone clear this up for me once and for all?

Once in Penn Station in NYC with my old Mogul titan, deep underground waiting for a train, I turned on google maps. To my surprise, gmaps pinpointed me on the map in penn station. Clearly, it did not use GPS. I have no been able to get the TP to do this kind of action. Was that a-GPS in action?