I am pretty sure that Captain is the highest rank available to an LDO under present Navy regulations.
Admiral of the Navy. However, there is no one currently serving at that rank in today's armed forces. Admiral of the Navy was a wartime rank last used in WWII. The current 'Highest Ranking Officer' in the Navy is the Chief of Naval Operations (CNO) with the rank of Admiral.
The highest rank someone can reach in the Royal Australian Navy is Admiral of the fleet. The Royal Australian Navy was created in 1911.
Admiral of the fleet
In peace time Admiral. But there is a higher rank of Admiral of The Fleet used in war time.
His current Rank is Admiral of the Fleet
vice-admiral
The highest rank currently held in the Indian Navy is "Admiral" There is a higher rank "Admiral of the Fleet", hower this is an honorary rank issued only in wartime, and has never been given to anyone so far.
Gary Roughead, he is the current Chief of Naval Operations. His rank is that of a 4 star admiral which is the highest rank that can be given during peace time.
The highest rank in the US Navy is O-10 Admiral (4 stars). EXCEPT during wartime, when the rank of Fleet Admiral (5 stars) is attainable. A Captain in the US Navy is an O-6. Commodore is not used by the US Navy,
The current level cap is level 45 and the current highest rank for both classes and reputation in 10.
I think it is The First Lord Seaman.
Captain 1st Rank in the Russian Navy is the highest Senior Officers rank, preceded by Captain 2nd Rank and followed by Rear Admiral. It corresponds to the rank of Colonel in the Army and the Air Force.