Chief of Air Force, Air Marshal Geoff Brown, AO, prior his last flight in an F/A-18 Hornet. *** Local Caption *** Chief of Air Force, Air Marshal Geoff Brown, AO, completed his last flight in an F/A-18 Hornet at RAAF Base Williamtown before completing his tenure as Chief of Air Force. In 1990, Air Marshal Brown was posted to RAAF Base Williamtown for Hornet conversion and then completed a short tour as a Hornet Pilot at No. 77 Squadron.