a mine in November of that same year. Prinz Eugen also featured two Barr and Stroud optical rangefinder posts on both the starboard and port sides for the secondary guns of the battleship. These rangefinders were equipped with an armored cupola, which housed an Schwarzlose M.07/12 anti-aircraft machine gun. Prinz Eugen was equipped with torpedo nets, though they were removed in June 1917. Propulsion Prinz Eugen possessed four shafts and four Parsons steam turbines, which were housed in a separate engine-room and powered by twelve Babcock & Wilcox boilers. They were designed to produce a total of , which was theoretically enough to attain a maximum designed speed of . It was reported during her speed trials that she attained a top speed of , though her actual top speed is unknown as the official sea trial data and records for all ships of the Prinz Eugen class were lost after the war. Prinz Eugen also carried of coal, and an additional of fuel oil that was to be sprayed on the coal to increase its burn rate. At full capacity, Prinz Eugen could steam for at a speed of . Armament Constructed at the Škoda Works in Plzeň, Bohemia, Prinz Eugens main battery consisted of twelve 45-calibre Škoda K10 guns mounted in four triple turrets. Two turrets each were mounted forward and aft of the ship's main superstructure in a superfiring pair. The implementation of triple turrets aboard Prinz Eugen came about for two reasons: the need to ensure the ship had a more-compact design and smaller displacement to conform to Austro-Hungarian naval doctrine and budget constraints, and to counter the implementation of triple turrets on the Italian Dante Alighieri. Having three guns on each turret rather than two made it possible to deliver a heavier broadside than other dreadnoughts of a similar size and meant a shorter citadel and better weight distribution. Prinz Eugen carried a secondary armament which consisted of a dozen 50-calibre Škoda K10 guns mounted in casemates amidships. Additionally, eighteen 50-calibre Škoda K10 guns were mounted on open pivot mounts on the upper deck, above the casemates. Three more Škoda K10 guns were mounted on the upper turrets for anti-aircraft duties. Two additional Schwarzlose M.07/12 anti-aircraft machine guns were mounted atop the armored cupolas of her rangefinders. Prinz Eugen was also equipped with two Škoda G. L/18 landing guns, and two Škoda SFK L/44 S