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
Royal Air Force Antarctic Flight from Mawson station. One was lost on the return voyage, but the other served in Antarctica over a number of years until it was sold after the end of the 1958/59 season. Another two Austers were operated by the RAF and RNZAF (as "Auster Antarcticas") as part of the Commonwealth Trans-Antarctic Expedition in 1955-58. Royal Air Force Antarctic Flight The Royal Air Force Antarctic Flight was an independent flight of the Royal Air Force organised to support the Norwegian–British–Swedish Antarctic Expedition in 1949-50. It was the first RAF unit to operate in Antarctica. The Flight was led by Squadron-Leader George