What exactly is a Captains Mast. Just an old woman that would like to know.....:O)
Non-judicial punishment under Article 15 of the Uniform Code of Military Justice. It is akin to a misdemeanor conviction in civil court.
When a minor infraction is committed, you go up in front of a Navy Captain for judgement. If the person doesn’t like that, he can request a Court Martial which consists of other officers.