No one has still answer the most simple question in all of this. Why oh why do the raaf need to lock up airspace between to major city's on what probably the most flown route north out of the largest city in Australia. From coast to range any way you look at it at some point even if you go west out of Sydney you over tiger country again. It make zero sence at all for this airway to be locked up and cleareance required. Can any give a positive view on why it should require cleareance or why it should be locked up.
Let's not forget that life's lost but look forward to prevent it happening again.
Cheers