Some good fishing here; thanks
4711 !
The nub here is the difference between US and Oz procedures [as perceived by AsA's Masters!!??] You can't just dump a system on a country without bringing the culture over as well. A US ATCO would have used lateral or vertical sep to make SURE the two didn't conflict [unless one could ack 'see&avoid.]
With TCAS equipped a/c, 500' is an RA, like it or not. Methinks the ATCO's here aren't being given the full story on how this REALLY works in the US [for starters, VFR are welcomed, given workload!]
G'day
