 The ship 's main battery consisted of four 12 @-@ inch ( 305 mm ) guns mounted in two twin gun turrets , one forward and one aft . The secondary battery consisted of fourteen 6 @-@ inch ( 152 mm ) quick @-@ firing guns , mounted in casemates on the sides of the hull and in the superstructure . A number of smaller guns were carried for defence against torpedo boats . These included 20 QF 12 @-@ pounder 12 cwt guns , eight 47 @-@ millimetre ( 1 @.@ 9 in ) 3 @-@ pounder guns and ten 37 @-@ millimetre ( 1 @.@ 5 in ) 2 @.@ 5 @-@ pounder Hotchkiss guns . She was also armed with four submerged 18 @-@ inch torpedo tubes . Hatsuse 's waterline armour belt consisted of Harvey armour and was 4 – 9 inches ( 102 – 229 mm ) thick . The armour of her gun turrets had a maximum thickness of 10 in ( 254 mm ) and her deck ranged from 2 @.@ 5 to 4 inches ( 64 to 102 mm ) in thickness . 
