Man-o-war The peak of naval battleship design, the Man O' War is a staggering achievement. With triple decks bristling with up to 100 cannons and shrouded in a nearly impenetrable hull, the Man O' War is the true ruler of the seas and oceans. Unfortunately, its huge size and weight limits this lumbering behemoth to large naval battles and fort bombardment. In addition, the costs of her crew, ordnance and repairs are a major strain on the purse of all but the wealthiest captain.