was given torpedo bulges to improve her underwater protection and to compensate for the weight of the additional armor and equipment. These changes increased her overall length to , her beam to and her draft to . Her displacement increased over to at deep load. The ship's metacentric height at deep load was . In November 1944, the tops of Nagatos mainmast and funnel were removed to improve the effective arcs of fire for her anti-aircraft guns. Propulsion Nagato was equipped with four Gihon geared steam turbines, each of which drove one propeller shaft. The turbines were designed to produce a total of , using steam provided by 21 Kampon water-tube boilers; 15 of these were oil-fired while the remaining half-dozen consumed a mixture of coal and oil. The ship could carry of coal and of fuel oil, giving her a range of at a speed of . The ship exceeded her designed speed of during her sea trials, reaching at . Funnel smoke would often choke and blind crewmen on the bridge and in the fire-control systems so a "fingernail"-shaped deflector was installed on the fore funnel in 1922 to direct the exhaust away from them. It was less than effective and the fore funnel was rebuilt in a serpentine shape in an unsuccessful effort during a refit in 1924. That funnel was eliminated during the ship's 1930s reconstruction when all of her boilers were replaced by ten oil-fired Kampon boilers, which had a working pressure of and temperature of . In addition her turbines were replaced by lighter, more modern, units. When Nagato conducted her post-reconstruction trials, she reached a speed of with . Additional fuel oil was stored in the bottoms of the newly added torpedo bulges, which increased her capacity to and thus her range to at 16 knots. Armament Nagatos eight 45-caliber 41-centimeter (16 inch) guns were mounted in two pairs of twin-gun, superfiring turrets fore and aft. Numbered one through four from front to rear, the hydraulically powered turrets gave the guns an elevation range of −2 to +35 degrees. The rate of fire for the guns was around two rounds per minute. The turrets aboard the Nagato-class ships were replaced in the mid-1930s with the turrets stored from the unfinished s. While in storage the turrets had been modified to increase their range of elevation to –3 to +43 degrees, which increased the