The term 'BEHIND, ON A SHIP' can be described by three crossword solutions: AFT (3 letters), ASTERN (6 letters), and LAG (3 letters). AFT is a nautical term used to describe the back of a ship, while ASTERN is a more specific term used to refer to the direction behind the ship. LAG is another nautical term used to describe the distance between two ships or the distance between a ship and a fixed point. All three terms are used to describe the position of something that is located behind a ship.