The term 'Deck Officers' refers to a group of personnel who are responsible for the navigation and operation of a ship. This includes the Mate, who is the second in command and is responsible for the day-to-day running of the vessel, as well as the Chief Mate, who is the first mate and is responsible for the overall management of the vessel. Other deck officers include the Bosun, who is responsible for the maintenance and repair of the vessel, and the Deck Cadet, who is responsible for learning the duties of the other deck officers.