armour-piercing (AP) shells. During the war the turrets were modified to increase their maximum elevation to 16°, but this only extended the range to . The rate of fire of these guns was 1.5 rounds per minute. When a full broadside was fired, "the resulting sheet of flame was big enough to create the impression that a battle cruiser had blown up; it was awe inspiring." No damage was done to the ship when firing full broadsides, despite the common idea that doing so would break the ship in half, but much of the ship's tableware and glassware did shatter when Agincourt fired her first broadside. As built, Agincourt mounted eighteen BL 6-inch Mk XIII 50-calibre guns. Fourteen were placed in armoured casemates on the upper deck and two each in the fore and aft superstructures, protected by gun shields. After the ship was seized by the British, two more were added abreast the bridge in pivot mounts, protected by gun shields. The guns could be depressed to −7° and elevated to 13°, later increased to 15°. They had a range of at 15° when firing a shell with a muzzle velocity of . Their rate of fire was about five to seven rounds per minute, but this dropped to about three rounds per minute after the ready ammunition was used up because the ammunition hoists were too slow or few to keep the guns fully supplied. About 150 rounds were carried per gun. Close-range defence against torpedo boats was provided by ten 45-calibre quick-firing guns. These were mounted in the superstructure in pivot mounts and protected by gun shields. Agincourt also carried three submerged torpedo tubes; one was on each beam and the last was in the stern. The water that entered the torpedo tubes when they were fired was discharged into the torpedo flat to facilitate reloading the tube and then pumped overboard. This meant that the torpedo crewmen would be operating in of water if rapid fire was required. Ten torpedoes were carried for them. Fire control Each turret was fitted with an armoured rangefinder in the turret roof. In addition, another one was mounted on top of the foretop. By the time of the Battle of Jutland in 1916, Agincourt was possibly the only dreadnought of the Grand Fleet not fitted with a Dreyer fire-control table. A fire-control director was later fitted below the foretop and