G'day Terry, What exactly do you mean by "Landing part of the circuit area"? As you know there was the tragic mid air at between a powered aircraft and a glider, I believe that occurred in the circuit on downwind, please correct me if I am wrong. At Tocumwal in 1997, there was a collision between a single seat glider and a two-seater in the circuit joining area (link: http://www.atsb.gov.au/publications/investigation_reports/1997/AAIR/aair199700049.aspx). Collisions between Powered aircraft: 2 at Hoxton Park, Parafield, Bankstown, may more. Until the recent radio changes, the only call that was given at Parafield when it was an MBZ (i.e. at night) was a "Turning base" call. The whole point of the new procedures is no obligation to give a radio response. The radio calls are meant to be SHORT broadcasts. And obviously if operational considerations preclude giving a call, don't give it! Also once away from the aerodrome, there is merit in changing to a the gliding frequency. In the mid north of South Oz, as you state, there are many aerodromes, however the chance of them all transmitting at the same time is low. Air to air radio transmit distance from 1,000 AGL is around 130 km, provided you don't have hills in the way and you have a powerful transmitter. For comps, there would be merit in setting up a comps frequency and having it NOTAM'd. But as you say, the proof will be in the pudding, My 2.2 c M.T.
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