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
Marshal of the Royal Air Force (marshal of the Royal Air Force is equivalent to a five-star rank) on an air force blue background. The rank insignia and flag exists in some other air forces for equivalent ranks. The rank title differs slightly, often being a variation on marshal of the air force, usually with the name of the relevant air force in place of the words 'Royal Air Force'. A notable example of this practice is the rank of marshal of the Royal Australian Air Force. Unlike other MRAFs who only relinquished their appointments, Sir Peter Harding resigned from the RAF in 1994. Consequently, his