A postscript to this thread I started - the press finally realises that Qantas is in the game:
'Perfect flight path': Qantas expands GPS use
Qantas is expanding its use of the latest generation GPS-based navigation systems to some Melbourne flights that promises "a perfect flight path, gate to gate ", which is expected to save oceans of fuel, tonnes of greenhouse gases, flying hours, time and money. From today, Qantas 737-800s flying in and out of Melbourne will be using a cutting-edge flight system called "RNP" — Required Navigational Performance.