…the lengthwise timber or steel structure along the base of a ship, supporting the framework of the whole, in some vessels extended downwards as a ridge to increase stability…
…a flat-bottomed boat of a kind formerly used on the Rivers Tyne and Wear for loading ships carrying coal…
…each of a pair of plates or timbers fastened under the sides of the hull of a ship to provide lateral resistance to the water, prevent rolling, and support its weight in dry dock…
…(of a ship or aircraft) not listing or tilting to one side…
