At sea, the 24-hour day is traditionally divided into seven watches, during which some of a ship’s crew are on duty. First Watch 8 pm to midnight (2000 to 0000) Middle Watch midnight to 4 am (0000 to 0400) Morning Watch 4 am to 8 am (0400 to 0800) Forenoon Watch 8 am to noon (0800 to 1200) Afternoon Watch noon to 4 pm (1200 to 1600) First Dog Watch 4 pm to 6 pm (1600 to 1800) Last Dog Watch 6 pm to 8pm (1800 to 2000)