Why does Civil Air. , the ATC Union accept this?
They must know that CASA will step away and blame the ATC if a mid air occurs because attention is taken away by self announcements by VFR pilots on ATC frequencies.
The ATCs were given a proportion of the blame for the Bankstown mid air even though the airspace at the time required pilot separation.
In many cases the ATCs will not be able to hear taxiing calls from aircraft but the calls could block out separation instructions.
Then again. As Creamy points out, it hasn't happened yet - so let's not worry!
Fascinating. No one is game to say who is pushing this at CASA and whether the calls are mandatory.
Sorry. My edit. We do have a sort of an answer from Triton- thanks