Originally Posted by
De_flieger
Dick, I think you'd have more luck with an up-to-date map that accurately depicts the problems as what you've presented has issues that detract from the validity or otherwise of your points, and will give people grounds to discount your arguments. Looking at some of your overlapping circles that you say indicate a problem, there are a few issues that I can see.
Saying that Redcliffe will overlap Brisbane with a 20nm ctaf is misleading, as Brisbane is CTA 24-7, isn't a CTAF, and outside of extreme emergency situations won't be for the forseeable future. Likewise Lismore and Ballina won't have a problem with overlapping CTAF frequencies because they already share a common overlapping CTAF frequency due to their proximity. They're 16 miles apart, so even if you decided that 10NM (as per current rules, CAR166 and at an altitude likely to conflict with aerodrome operations) was a suitable radius, there would still be an overlap where either aircraft were on the same common CTAF, or they would be on different frequencies with the potential for problems. The same applies to Caloundra and Caboolture, 18NM apart, they already have a common CTAF frequency to deal with the overlapping areas, and using 10NM radius would also still have an overlap.
Boonah and Kooralbyn both are uncertified unregistered civilian aerodromes with no requirement to carry, monitor or even be anywhere near a radio as best I can tell, so they wouldn't be affected without other changes to the rules to mandate radio carriage.
Toowoomba West Wellcamp, or whatever it is called this week, has been operating for a couple of years now with RPT, freight and other operations and isn't even on your map! That region around the Toowoomba area also has a broadcast area that covers a few of the aerodromes in it, precisely because of their proximity and traffic mix, and that wouldnt be changed by going to a 10 NM requirement, or a 20NM requirement, or any other practical or otherwise distance requirement given Oakey is 8NM from Wellcamp, which is 6NM from Toowoomba, which has a training area that extends south
toward Wellcamp and with a few other scattered strips marked on the maps within a few miles for good measure.
North of the Gold Coast there are a couple of circled airfields, it appears that they are Southport and maybe Heck Field or Couran Cove Resort helipad? Either way, those circled airports are 9 and 6 NM apart respectively with overlying controlled airspace at 3500 feet, and all already on the same CTAF again, as makes sense for airfields so close together, and going from an unspecified radius to a 10 or 20NM radius wouldn't change operations between those fields.