The chief mate is the head of the deck department. This involves administrative tasks such as scheduling work, quality control, coordinating with other departments, and conflict resolution. The Chief Mate also compiles supply, overtime, and cost control records, and requisitions or purchases stores and equipment.[citation needed] Depending on the number of officers carried, he may or may not be a watch officer. If the ship carries a Second Mate and two Third Mates, he will be a dayworker, with a duty day from 0800 to 1700 ship's time. If only one Third Mate is carried, he will stand the 4 to 8 watch in addition to handling his executive duties.