Master at arms
From RogueWiki
The term has been used in the Royal Navy since the time of King Charles I. Originally the Master-at-Arms was a petty officer who looked after personal arms such as swords and firearms, ensuring they were kept in good order and their ammunition was prepared and ready for use in combat. He also instructed other members of the crew in the use of arms. He later also became responsible for discipline.
The Ship's Corporals assisted the Master-at-Arms with his duties.
