The HF operators are all physically located in Brisbane, though the transmitters may be elsewhere.
HF is simply a relay between the controller and the aircraft, used when the aircraft is out of range of the controller's own VHF frequencies. So when the controller wants to communicate with the aircraft, they call the HF operator on a landline and pass their message, and the HF operator then calls the aircraft. Or when the aircraft wants to talk to ATC, they call on HF and the HF operator answers, takes the message and then calls the controller on the landline to pass it on.
So the aircraft might be under the jurisdiction of a Melbourne Centre controller, but they still talk to 'Brisbane International'.
That make any sense?
Adam
|