either side of the rear conning tower. Production remained behind schedule and competing demands after the start of the war caused further delivery problems. Grosser Kurfürst received her original complement in 1915 and König and Kronprinz had two guns installed that year. Kronprinz had another pair installed by 1918, by which time Markgraf received two of the guns. As was customary for capital ships of the dreadnought era, the ships were armed with five submerged torpedo tubes, which were supplied with a total of sixteen torpedoes. One tube was mounted in the bow and the other four were placed on the broadside, two on each side of the ship. The torpedoes were the G7*** type, which carried a warhead. They could be set at three speeds: for a range of , for a range of , or for a range of . Fire control The König-class carried a pair of stereoscopic rangefinders to direct the fire of the main guns. These were mounted atop the main and aft conning towers, and ranging data was sent to a central command post that had a Bg-Mittler C/13 rangefinder equalizer that was used to filter out erroneous data and calculate ranges to determine the correct elevation of the guns. This information was then sent to the R.W. Geber C/13, a fire-control director, to communicate firing instructions to the guns. The artillery officer used his own periscope sight, which electronically communicated an indicator to the gunners in the turrets; the gunners used their own sights to point the turrets at the target indicated by the artillery officer. Armor The general layout of the armor scheme for the König class was similar to that of the Kaiser class. The steel used for the ships' protection consisted of Krupp cemented armor. Their main armor belt was in the armored citadel of the ships, where the ammunition magazines and propulsion machinery spaces were located. The main strake extended from above the waterline to below the line; an upper strake that was thick covered the side of the hull above the main belt. Forward of the central citadel, the belt thinned to 20 cm for a third of the way to the stem, and on the lower edge it tapered to 15 cm. Further forward, the main belt was reduced to 15 cm, being reduced to 12 cm on the bottom edge. Aft of the citadel, the belt