Charles Adams was appointed the test director, with J. A. T. Dawson as his deputy, and J. T. Tomblin as the superintendent. Air Commodore W. P. Sutcliffe commanded the services, with Group Captain Hugh Disney in charge of the RAF component. This was by far the largest of the three service components, with 31 aircraft and about 700 men, including a 70-man balloon detachment. Most of the aircraft were based at RAAF Base Edinburgh near Adelaide, although the Avro Shackletons were based at RAAF Base Pearce near Perth in Western Australia. There were 170 men in 22 scientific groups, including 39 Australians and 17 Canadians. Another 450 Australian and British personnel formed the Maralinga Range Support Unit (MARSU) under the command of Colonel R. Durance from the Australian Army. He was succeeded by Colonel G. D. Solomon in 1959, Colonel J. K. Lynch in 1961, Colonel W. G. Henderson in 1962, Colonel A. F. Swinburne in 1963, and Colonel J. G. Ochiltree in 1964.