 Controversially, she was designed so that if her un-armoured ends should be seriously damaged in action and become water-logged, the buoyancy of the armoured centre section of the ship would keep her afloat and upright.The ship was the first major warship to depend in part for the protection of her buoyancy on a horizontal armoured deck below the water-line rather than armoured sides along the waterline.The original concept was based upon an outline design similar to that for HMS "Dreadnought", but with improved armament.