James, The trial has nothing to do with ADSB as most aircraft flying into Proserpine are not yet ADSB equipped.
Lefty is correct- the alarm will only go off if everyone is about to die. There will be no false alarms if pilots report when visual-
It works all around the world and in our terminal airspace- why not at Prosepine.
James you primarily support the views of the Canberra bureaucracy- why is that?