You could enter as an Ensign if you wanted to go the officer route.
The highest rank someone can reach in the Royal Australian Navy is Admiral of the fleet. The Royal Australian Navy was created in 1911.
I am pretty sure that Captain is the highest rank available to an LDO under present Navy regulations.
that depends on which country.
Admiral of the fleet
In peace time Admiral. But there is a higher rank of Admiral of The Fleet used in war time.
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.
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,
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.
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.
petty officer first class