Heard them at the Gold Coast too...exercise ECADEX 2011 would probably be the reason, they've been going up and down the coast, to and from Amberley for the past week and a half. It's been great
![Big Grin](images/smilies/biggrin.gif)
Here is the AIP supplement.
http://www.airservicesaustralia.com/...up/s11-h68.pdf