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
Air force officer ranks of air force rank insignia in use, many air forces use army-style rank insignia whilst others follow the Royal Air Force style (shown below). Air force officer ranks Many Air forces of use a rank system similar to Armies, however, the RAF and the air forces of many Commonwealth countries, or those formerly under a British influence, use a different set of ranks loosely based on naval equivalents; Lieutenant, Commander, Captain and Commodore are prefixed for air force use with "Flight", "Wing", "Group" and "Air", respectively (the first three being the units that they used to command). To assist in