though based on the general type that had formed the basis of the preceding four battleship designs, marked the first significant change in the series. Like all late pre-dreadnoughts that entered service in the mid-1900s, Africa was made almost instantaneously obsolescent by the commissioning of the all-big-gun in December 1906, armed with a battery of ten heavy guns compared to the typical four of most pre-dreadnoughts. Africa was long overall, with a beam of and a draft of . The King Edward VII-class battleships displaced normally and up to fully loaded. Her crew numbered 777 officers and ratings. The King Edward VII-class ships were powered by a pair of 4-cylinder triple-expansion engines that drove two screws, with steam provided by sixteen water-tube boilers. The boilers were trunked into two funnels located amidships. The King Edward VII-class ships had a top speed of from . On her 8-hour full-power trials conducted on 3 June 1906, Africa reached a top speed of from an average of . Africa had a main battery of four 40-calibre guns mounted in twin-gun turrets fore and aft. These were supported by a heavy secondary battery of four guns in four single turrets, two on each broadside. The ships also mounted ten 6-inch 50 calibre guns mounted in casemates, in addition to fourteen 12-pounder guns and fourteen 3-pounder guns for defence against torpedo boats. As was customary for battleships of the period, she was also equipped with five torpedo tubes submerged in the hull; two were on each broadside, with the fifth in the stern. Africa had an armoured belt that was thick; the transverse bulkheads on the aft end of the belt was thick. The sides of her main battery turrets were also 8 to 12 in thick, atop 12 in barbettes, and the 9.2 turrets had sides. The casemate battery was protected with of armour plate. Her conning tower had 12-inch-thick sides. She was fitted with two armoured decks, thick, respectively. Operational history Early career HMS Africa was laid down at Chatham Dockyard on 27 January 1904, launched on 20 May 1905, and completed in November 1906. Named for the British Empire's colonies in Africa, she was the last battleship constructed at Chatham, later classes of battleships being too large for the yard. Africa commissioned on 6 November 1906 at Chatham Dockyard for service in the Atlantic Fleet. She transferred to the Channel Fleet on