Centreline

Centreline is an imaginary line that runs longitudinally along the center of a ship, from the bow to the stern. It is the line that divides the ship into two equal halves, port and starboard. The centreline is an important reference point for navigation, stability, and loading calculations. It is used to determine the position of cargo, equipment, and personnel on board the ship. The centreline is also used to describe the location of various shipboard systems and equipment, such as the propulsion system, steering gear, and anchor. In addition, the centreline is used as a reference point for measuring the ship's draft, which is the distance between the waterline and the keel.
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