The ship 's secondary armament consisted of fourteen 45 @-@ calibre 6 @-@ inch ( 152 mm ) quick @-@ firing ( QF ) guns mounted in casemates . Eight of these guns were positioned on the main deck and the other six guns were placed above them in the superstructure . They fired 100 @-@ pound ( 45 kg ) shells at a muzzle velocity of 2 @,@ 300 ft / s ( 700 m / s ) . Protection against torpedo @-@ boat attacks was provided by twenty QF 12 @-@ pounder 12 cwt guns . The 12 @-@ pounders fired 3 @-@ inch ( 76 mm ) , 12 @.@ 5 @-@ pound ( 5 @.@ 7 kg ) projectiles at a muzzle velocity of 2 @,@ 359 ft / s ( 719 m / s ) . Lighter guns consisted of eight 47 @-@ millimetre ( 1 @.@ 9 in ) three @-@ pounder Hotchkiss guns and four 47 @-@ millimetre 2 @.@ 5 @-@ pounder Hotchkiss guns . The former were mounted in the superstructure and the latter in the fighting tops . The three @-@ pounder gun fired 3 @.@ 19 @-@ pound ( 1 @.@ 45 kg ) projectiles at a muzzle velocity of 1 @,@ 927 ft / s ( 587 m / s ) , while the 2 @.@ 5 @-@ pounder fired 2 @.@ 5 @-@ pound ( 1 @.@ 1 kg ) shells at a muzzle velocity of 1 @,@ 420 ft / s ( 430 m / s ) . The ship was also equipped with four submerged 18 @-@ inch torpedo tubes , two on each broadside .