That was in the circuit/north west of Moorabbin, not near Carrum. VH-CGT was inbound from the northwest, Brighton direction, and VH-UPY was doing solo circuits on the western circuit for some reason, and not very consistent circuits at that.
It interesting that GAAP airports came about due to concerns over high density operation of light aircraft, so after a study process including overseas experience they implemented GAAP. Which for 30 years or so was absolutely fine and then suddenly was not when an aircraft that should have been on the Eastern circuit doing solo circuits was caught out in an unfortunate situation. The problem now is that Class D can't handle the numbers (suprise, suprise) and they are looking for solutions that were already in place 20 years ago.
Moorabbin Airport had it's peak in movements in 1989 at 399,000 movements, 150,000 movements more that the last few years average, what has gone wrong?
One of the main concerns was radio traffic for control services, so a main concept in GAAP was to reduce radio traffic by not requiring full clearances and the traffic just followed each other with joining 'instructions'. The only clearance required was the take-off and landing part.
The waffle that has crept into ATC procedures lately really has significant safety implications in complex, busy situations.
Last edited by 43Inches; 8th Nov 2023 at 05:46.