How does one prevent transmission on a frequency in an area the size of the continental US?
It's radio. Either you jam it or it works. That's the selling point.
It's not the transmitting per-se. The network that gives controllers access to the en route radio system isn't letting them connect to the radios.
It's not the transmitting per-se. The network that gives controllers access to the en route radio system isn't letting them connect to the radios.