 The ship was armed with four BL 12 @-@ inch Mk X guns arranged in two twin gun turrets , one each fore and aft . Her secondary armament consisted of ten BL 9 @.@ 2 @-@ inch Mk XI guns , in twin gun turrets on each corner of the superstructure , and a single gun turret between them , plus 24 QF 12 @-@ pounder 18 cwt guns . She also mounted five submerged 17 @.@ 7 @-@ inch ( 457 mm ) torpedo tubes for which 23 torpedoes were stowed aboard . 
