 <unk> construction also <unk> the later debate in battleship design between <unk> and ' all @-@ or @-@ nothing ' armour design . Warrior was only semi @-@ armoured , and could have been disabled by hits on the bow and stern . As the thickness of armor grew to protect ships from the increasingly heavy guns , the area of the ship which could be fully protected diminished . <unk> 's armor protection was largely limited to the central citadel amidships , protecting boilers and engines , turrets and magazines , and little else . An ingenious arrangement of <unk> @-@ filled compartments and <unk> bulkheads was intended to keep her stable and afloat in the event of heavy damage to her un @-@ armored sections . 
