Here to help
Sorry, your point was mistaken as an attack and an RA sounded in the presense of multiple PPRuNe targets interestingly eminating from a single IP Address at Brisbane Center.
(Careful Plazbot, big brother is watching
)
OK, 1, 2 and 3.
U/S Transponder, the aircraft should NOT BE IN E.
Let me expand on your scenario.
"C421 approaching Cairns from overhead Townsville at 14,500 on Nov 24 2001 with Transponder U/S and having miscalculated a position due to a 50-kt tailwind mistakes Cape Cleveland for Cape Bowling Green and misses a 717 climbing out of Tvl by 50 feet and 100 meters."
So, how would 'C' prevent this???
In E I put it to you that both pilots would at lease know their see and avoid responsibilities.
AK