 Her main armament consisted of six BL 9 @.@ 2 @-@ inch Mk X guns in single turrets , two on the <unk> and two on each beam , giving a broadside of four 9 @.@ 2 in guns . Her secondary armament of four BL 6 @-@ inch Mark XI guns was arranged in single casemates . They were mounted amidships on the main deck and were only usable in calm weather . Twenty Vickers QF 3 @-@ pounders were fitted , six on turret roofs and fourteen in the superstructure . The ship also mounted three submerged 18 @-@ inch torpedo tubes . 
