 Their main armament consisted of four breech-loading (BL) 13.5-inch (343 mm) guns mounted in two twin-gun barbettes, one each fore and aft of the superstructure. Each gun was provided with 80 rounds. Their secondary armament consisted of ten quick-firing (QF) 6-inch (152 mm) guns. 200 rounds per gun were carried by the ships. Sixteen QF 6-pounder (2.2 in ( 57 mm) ) and a dozen QF 3-pounder (1.9 in ( 47 mm) ) Hotchkiss guns were fitted for defence against torpedo boats. The two 3-pounders in the upper fighting top were removed in 1903 – 04 and all of the remaining light guns from the lower fighting tops and main deck followed in 1905 – 09. The Royal Sovereign-class ships mounted seven 14-inch (356 mm) torpedo tubes, although Empress of India had four of hers removed in 1902.
