Flying officer
Flying officer (Fg Off or F/O) is a junior officer rank used by some air forces, with origins from the UK Royal Air Force. The rank is used by air forces of many countries that have historical British influence.
Flying officer is one rank above pilot officer and one below flight lieutenant.
It is equivalent to the rank of sub-lieutenant in the navy and lieutenant in other services.
The equivalent rank in the Women's Auxiliary Air Force was "Section Officer" before this organisation adopted common ranks with male officers.