Sea Captain character jug produced by Royal Norfolk of Shelton, England, circa 1960. A sea captain is a title for the commanding officer of a military unit; the supreme leader of a navy ship, merchant ship, airplane, spacecraft, or other vessel; or the commander of a port, fire or police department, election precinct, etc. In militaries, the captain is typically at the level of an officer commanding a company or battalion of infantry, a ship, or a battery of artillery, or another distinct unit. The term also may be used as an informal or honorary title for persons in similar commanding roles. This Sea Captain jug is an advertising piece for Old Smuggler Scotch Whisky.