ADSB is a no brainer, but, can someone explain to me why every capital city has a large chunk of it's available airspace made unavailable or restricted by large military airfields. Why, for example can't Pearce flying be moved a 100 miles further west, or Richmond moved to Wagga? Amberley moved to Roma? The public service only operate a handful of aircraft and mostly fly Mon-Fri 9 to 5. In smarter countries like the USA, these guys are out in the deserts.