Armament consisted of 4-9“ Armstrong guns in a casemate with gun ports in the corners allowing a shooting range fore and aft. Horsepower 500 nhp. Dimensions 235 x 28 x 30 hold) x 17.6 (fore)-18 (aft) feet and 1.601 tons tonnage. Speed 13 knots. Armour thickness 6-9” with 10” teak. Schooner-rigged. Built at Thames Iron Works and Shipbuilding Company, Blackwall, England in 1869. Crew numbered 145 men (included 16 officers), should be 219 men.