 The center turret and the torpedo tubes were removed and all of the existing secondary armament and AA guns were replaced by a dozen guns in four triple-gun turrets and ten AA guns in single turrets.In addition the ships were fitted with fifteen 54-caliber Breda light AA guns in six twin-gun and three single mounts and sixteen Breda Model 35 AA guns, also in twin mounts.The 305-millimeter guns were bored out to 320 millimeters (12.6 in) and their turrets were modified to use electric power.