What does separation “assurance” mean?
I’m told by Aussie air traffic controllers that one of the major differences between our country and other countries overseas with modern aviation systems is that in Australia, the controllers not only have to separate aircraft but they also have to provide “separation assurance”.
Are there any air traffic controllers who can explain on this thread what Airservices actually means by that? Is it one of the reasons you hear the term “clearance not available”, which doesn’t appear to be in the vocabulary of air traffic controllers overseas?