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| Admiral of the fleet | |
|---|---|
&sq=Qlik&lang=&file=File:Australia-Navy-OF-10-collected.svg) Shoulder and sleeve insignia | |
| Country |  Australia |
| Service branch |  Royal Australian Navy |
| Abbreviation | AF |
| Rank group | General officer |
| Rank | Five-star |
| Non-NATO rank | OF-10 |
| Pay grade | O-11 |
| Formation | 2 June 1938 (ceremonial) |
| Next lower rank | Admiral |
| Equivalent ranks | |
Admiral of the fleet (AF) is the highest rank in the Royal Australian Navy (RAN) and is currently held by Charles III, King of Australia. The rank of Admiral of the fleet is a ceremonial, not active or operational, rank. It equates to the NATO rank grade OF-10. Equivalent ranks in the other services of the Australian Defence Force 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 continuously-filled rank in the RAN is vice admiral, held by the Chief of Navy.