The distance from the surface of the water to the ship’s keel (how deep the ship is into the water).
The depth of a ship in the water. This distance is measured from the bottom of the ship to the surface of the water. Draft marks are cut into or welded on the surface of a ship’s plating. They are placed forward and aft on both sides of the hull and also amidships. At the midships draft we will also find the authorized Load Line markings which designate maximum drafts allowed for vessels under various conditions.
Depth in water at which a vessel floats
The depth of water a ship displaces when
she is afloat.