Spoiler
If you want, I have the ranks in the British Royal Navy
Officers
Captain
Commander (keep in mind they were technically lower ranked Captains, they commanded ships considered too small for captains)
Lieutenant
Midshipman
Officer Cadet
NCO's
Warrant Officer
Chief Petty officer
Petty Officer
Enlisted
Leading Rate
Able Seaman
But then again keep in mind that the ranks in the Royal Navy don't have a equivalent one in the army. They are all indepedent.
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No offense, but I don't really think these ranks are napoleonic era accurate, E.g: where is bosum?
Also, when I did a bit of research for british naval ranks, I never saw Chief Petty officer amongst them.
Are you sure these ranks are napoleonic? They look more modern.