How do you find baseline of ship?

To find the baseline of a ship, you typically refer to the ship's design documentation, which specifies the baseline as a reference point for measurements. It is usually determined at the waterline or a specific horizontal plane on the hull, often the top of the keel or the centerline of the ship. Accurate measurements can be taken using leveling instruments and reference points marked on the ship. Additionally, the baseline is crucial for stability calculations and ensuring the vessel's performance is as designed.