Assistant Chief of the Air Staff (ACAS) is the Deputy to the Chief of the Air Staff in the Royal Air Force. Chief of the Air Staff can also refer to the head of the Canadian Forces Air Command or the head of the Indian Air Force. ... The Royal Air Force (often abbreviated to RAF) is the air force branch of the British Armed Forces. ...

One of the many duties of the ACAS is to sit on the board of the Civil Aviation Authority. The Civil Aviation Authority (CAA) is the public corporation which oversees and regulates all aspects of aviation in the UK. It was established in 1972. ...

The current ACAS is Air Vice-Marshal Chris Moran. An Air Vice Marshals sleeve/shoulder insignia Air Vice Marshal is the third most senior rank active in the Royal Air Force today, after the inactivation of Marshal of the Royal Air Force as a substantive rank in peacetime during defence cuts of the 1990s. ...