Group captain the wing commander and group captain command pennants are triangular in shape. The rank of group captain is also used in a number of the air forces in the Commonwealth, including the Bangladesh Air Force, Ghana Air Force, Indian Air Force (IAF), Nigerian Air Force, Pakistan Air Force (PAF), Royal Australian Air Force (RAAF), Royal New Zealand Air Force (RNZAF), Sri Lankan Air Force and the Trinidad and Tobago Air Guard. It is also used in the Egyptian Air Force, Hellenic Air Force, Royal Air Force of Oman and the Royal Thai Air Force. The Royal Canadian Air Force used
Structure of the Royal Air Force in 1989 operational RAF bases and stations, the AOC Signals Units and AO Signals administered the following units. Additional specialized signals units were detached to Royal Air Force Germany, British Sector Berlin, British Forces Gibraltar, British Forces Falkland Islands and British Forces Cyprus. The RAF Regiment was headed by the Commandant-General, RAF Regiment and Director-General of Security with the rank of Air Vice-Marshal, who was responsible for security at all RAF installations. The RAF Regiment served as the Royal Air Force's airfield defence corps. The regiment administered, trained and maintained its squadron, which operationally were under the commanders of the airfields they