Capn:
If it's perceived by the Skygods and the CAGROs (and CASA?) to be necessary, why aren't the rest of the High Cap community doing it as well? Are their pax less important?
I support your objective for more CTAF radio discipline but I can't agree that a jet simply giving a CAGRO an estimate for the circuit area when he's at 150nm fits into the category of poor radio discipline.
If the QF 737 leaves his call until 30nm Broome, that only gives the CAGRO some 5-6 minutes to write up the strip, develop his SA and then pass the relevant traffic before the aircraft hits the circuit area. In Ayers Rock's case, the CAGRO only has some 3-4 minutes to do this (20nm inbound call requirement not 30nm like Broome).
The 150nm call is only provided by jets. Turboprop performance offers CAGROs more time at the CTAF boundaries, so the 150nm call is not required by them IN THE INTERESTS OF MINIMISING CTAF FREQUENCY CONGESTION.