On page three this thread is an airfield diagram with 'original' no circling warning over the hills east of the airfield RAAF Pearce. It has been a long time and in my researches I had forgotten a lot of detail - memory jogged by these forums though. As I recall we were not allowed to turn left on runway 18, I guess especially at night after the CDTAC BEST crash. However I do not recall EVER using runway 18 - if only perhaps to sojourn to Jandakot (south of Pearce) for 'night circuits under instruction' there.