Admiral of the fleet (AF) is the highest rank in the Royal Australian Navy (RAN), but is a ceremonial, not active or operational, rank. It equates to the rank code O-11. Equivalent ranks in the other services are field marshal and marshal of the Royal Australian Air Force. Like those ranks, admiral of the fleet is a five-star rank. The subordinate naval rank, and highest active rank in the RAN, is admiral. This rank is only held when the Chief of the Defence Force is a naval officer. The highest permanent rank in the RAN is vice admiral, held by the Chief of Navy.