I reckon that it'll be that if "Kyeema" had been provided with radar guidance in Class G, the tragedy would never have happened.
Griffo, it was the Professional Radio &
Electronics Institute of Australasia while I were in it.
Do you know why FSOs were not simply trained to separate aircraft?
Because FS came from Aeradio which came from old time wireless operators (hence the union).
ATC started from airline pilots (who historically had needed wireless operators on board) and never the two would meet.
Read the relevant sections in the link I posted earlier.