I'm a real amateur when it comes to technology but my cell phone,for example,is capable of broadcasting its location using GPS technology.I've also read that there are other devices that can do the same thing.Perhaps that's what got him.
>> “I’m a real amateur when it comes to technology but my cell phone,for example,is capable of broadcasting its location using GPS technology” <<
.
Not quite.
Your cell phone collects data to determine its position from GPS satelites, and then sends the data on the normal cell frequencies. GPS is not a two way communication system. Its a global code phase measurement system.