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 are listed under the airfields where they were based. The Royal Auxiliary Air Force (RAuxAF) was commanded by an Air Vice-Marshal and provided reinforcements to the Royal Air Force, which were manned by civilians and called upon in times of need or war. Although all RAuxAF units had been disbanded in 1957 it lived on in three Maritime Headquarter Units, which provided ground and air crews for the Nimrod MR.2s of No. 18 (Maritime) Group. In 1979 the RAuxAF returned to life with the formation of three Field Squadrons to provide ground airfield defence at Royal Air Force airfields. During