"A hull is the watertight body of a ship, boat, or flying boat. The hull may open at the top (such as a dinghy), or it ...
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may be fully or partially covered with a deck. Atop the deck may be a deckhouse and other superstructures, such as a funnel, derrick, or mast. The line where the hull meets the water surface is called the waterline." - (en.wikipedia.org 13.05.2021)