 The ship had a secondary battery of eight 15 cm ( 5 @.@ 91 in ) quick @-@ firing guns mounted in MPL C / 06 casemates , four centered amidships on either side of the vessel . These guns could engage targets out to 13 @,@ 500 m ( 14 @,@ 800 yd ) . They were supplied with 1320 rounds , for 165 shells per gun , and had a sustained rate of fire of 5 – 7 rounds per minute . The shells were 45 @.@ 3 kg ( 99 @.@ 9 lb ) , and were loaded with a 13 @.@ 7 kg ( 30 @.@ 2 lb ) RPC / 12 propellant charge in a brass cartridge . The guns fired at a muzzle velocity of 835 m ( 2 @,@ 740 ft ) per second , and were expected to fire around 1 @,@ 400 shells before they needed to be replaced . 
