A watercraft having an inboard motor and a transom aft of the motor includes an elongate propeller shaft. The method is characterized in that a controller of the locker system causes one or several compartments to open in order to deposit mail and at least one new compartment opens automatically when a compartment is closed and when detecting means of the locker system have detected information allocated prior to sending. The manufacturing enterprise system runs on a network that is coupled to the Internet and is accessible to an outside enterprise or trading partner identified with having proper access permissions.