Boatswain

The Boatswain, or Bosun, is a middle enlisted personnel in the navy who's job it is to keep order and pass them along aswell.

Bosun's Job
Described in short, the job of the Bosun is to relay orders from the skipper and other officers to the lower ranks and enlisted men. They are the second highest enlisted rank and the highest rank before the "sir" title is required in formality.

How to be promoted
There are two words you must have great abilities in, seamanship and leadership. They are usually the ones who take care of the lower-rates, such as Cutters and Brigs, while officers take care of the main rates.