1) goods thrown overboard from a ship at sea to lighten it, e.g. in a storm (jetsam)

2) a unit of measurement of distance equal to 1760 yards or 1609 meters at land and 1852 meters at sea (nautical mile) (mile)

3) a person who stops ships at sea and steals from them (pirate)

4) a picture of a scene at sea (seascape)

5) a small instrument used for telling the time, worn on the wrist or carried in a pocket; (sailors on duty during) a period of two or four hours at sea (watch)