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 air defence missile squadron. In 1989 the Royal Air Force was speedily replacing its aging Phantom fighters with the more modern and more capable Tornado F3, whose superior supersonic acceleration, powerful radar and beyond-visual-range missiles made it the ideal platform to intercept and destroy Soviet bombers attacking the UK. In case of war, No. 11 (Air Defence) Group would have taken command of the five UK-based Hawk T.1 training squadrons, which, armed with AIM-9L Sidewinder missiles would have become the last line of defense against Soviet air attacks. No. 18 (Maritime) Group was commanded by an Air Marshal based at