<P> In the RAF, the rank insignia is three downward pointing chevrons below a crown . Flight sergeants are usually addressed as "flight" and never by the more junior rank of "sergeant". </P> <P> Flight sergeant is also used in many cadet organisations around the world, such as the Air Training Corps, Combined Cadet Force (RAF Section), Australian Air Force Cadets, and Royal Canadian Air Cadets . </P>

What did a flight sergeant do in ww2