 She was armed with ten 30 @.@ 5 cm ( 12 @.@ 0 in ) SK L / 50 guns arranged in five twin gun turrets : two superfiring turrets each fore and aft and one turret amidships between the two funnels . Her secondary armament consisted of fourteen 15 cm ( 5 @.@ 9 in ) SK L / 45 quick @-@ firing guns , six 8 @.@ 8 cm ( 3 @.@ 5 in ) SK L / 45 quick @-@ firing guns and five 50 cm ( 20 in ) underwater torpedo tubes , one in the bow and two on each beam . Markgraf 's 8 @.@ 8 cm guns were removed and replaced with four 8 @.@ 8 cm anti @-@ aircraft guns . The ship 's main armored belt was 350 millimeters ( 14 in ) thick . The deck was 30 mm ( 1 @.@ 2 in ) thick ; the main battery turrets and forward conning tower were armored with 300 mm ( 12 in ) thick steel plates . 
