 The commission of a regular officer is granted after successfully completing the 24-week-long Initial Officer Training course at the RAF College, Cranwell, Lincolnshire.To emphasize the merger of both military and naval aviation when the RAF was formed, many of the titles of officers were deliberately chosen to be of a naval character, such as flight lieutenant, wing commander, group captain, and air commodore.Other ranks attend the Recruit Training Squadron at RAF Halton for basic training.