Commander Air Force's mid-rank officers' ranks are modelled on those of the Royal Navy, the term wing commander is used as a rank, and this is the equivalent of a lieutenant colonel in the army or a commander in the navy. The rank of wing commander is above that of squadron leader and below that of group captain. In the former Royal Naval Air Service, which was merged with the Royal Flying Corps to form the Royal Air Force in 1918, the pilots held appointments as well as their normal ranks in the Royal Navy, and they wore insignia appropriate to
Royal Air Force 2 FTS and 6 FTS do not have a front-line training responsibility – their job is to group the University Air Squadrons and the Volunteer Gliding Squadrons together. 2 FTS's commanding officer holds the only full-time flying appointment for a Group Captain in the RAF, although he is a reservist. The British military operate a number of joint training organisations based at RAF Stations: A flight is a sub-division of a squadron. Flying squadrons are often divided into two flights, e.g., "A" and "B", each under the command of a squadron leader. Administrative squadrons on a station are also divided