Relative Ranks
| Royal Navy | Army | Royal Air Force |
| Admiral of the Fleet | Field Marshal | Marshal of the Royal Air Force |
| Admiral | General | Air Chief Marshal |
| Vice Admiral | Lieutenant General | Air Marshal |
| Rear Admiral | Major General | Air Vice-Marshal |
| Commodore* and Captain of six or more years | Brigadier | Air Commodore |
| Captain of less than six years | Colonel | Group Captain |
| Commander | Lieutenant Colonel | Wing Commander |
| Lieutenant Commander | Major | Squadron Leader |
| Lieutenant | Captain | Flight Lieutenant |
| Sub Lieutenant | Lieutenant | Flying Officer |
| Midshipman | Second Lieutenant | Pilot Officer |
Note: Officers of the same rank, rank with each other according to their seniority.
* This rank is held by Captains during their tenure of certain specific appointments. On completion they revert to the rank of Captain.
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