Occasionally, a dominating personality can influence the evolution of an organization or a navy. The greatest admiral in the British Navy since Nelson was John A. Fisher, who served as First Sea Lord from 1904 to 1910 and again from 1914 to 1915.
During a pivotal time in naval history, the Royal Navy was his fleet. Fisher was first to demand reforms in technology, in personnel handling, in tactics and strategy at sea. He was a leading proponent of improved naval gunnery: firing at longer ranges, with greater accuracy and faster rates of fire. Yet he believed that the torpedo would eventually supersede the great gun as the primary naval weapon. He believed in large, fast surface ships with heavy guns, and he supervised the design and construction of the Dreadnought, the first all-big-gun battleship.
Yet, Fisher was convinced that the submarine was the warship of the future and he urged the Royal Navy to invest in these sneaky undersea craft and develop tactics for them to sink battleships. He introduced destroyers and gave them their name. He began substitution of turbines for reciprocating engines and he urged the use of fuel oil rather than coal.
Fisher never commanded a ship during wartime. His role and his great service to the navy and his country were as an administrator and reformer. At the start of the First World War, Fisher appointed Admiral Sir John Jellicoe to command the Grand Fleet and provided Jellicoe with the vast assemblage of ships, battleships, battle cruisers, cruisers, destroyers, and submarines, with which Britain guarded the exits from the North Sea, shielded her coasts, and foiled the purposes of the German High Seas Fleet.