Marshal of the Air Force is a five star Air Officer rank and the highest attainable rank in the Indian Air Force. Marshal of the Air Force is ranked immediately above Air Chief Marshal. It is a ceremonial or wartime rank, having been awarded only once. Marshal of the Air Force Arjan Singh, DFC is the only Officer to have held this rank. Marshal of the Air Force is equivalent to Field Marshal in the Indian Army and admiral of the fleet in the Indian Navy. While the rank of admiral of the fleet has never been awarded, there have been two Field Marshals - Sam Manekshaw and K M Cariappa.