HMS Dreadnought was a battleship built for the Royal Navy that revolutionized naval power. Her entry into service in 1906 represented such an advance in naval technology that her name came to be associated with an entire generation of battleships, known commonly as the "dreadnoughts." The generation of ships she made obsolete became known as "pre-dreadnoughts", interestingly. Admiral Sir John "Jacky" Fisher, First Sea Lord of the Board of Admiralty, is credited as the father of Dreadnought. Shortly after he assumed office, he ordered design studies for a battleship armed solely with 12-inch (305 mm) guns and a speed of 21 knots (39 km/h; 24 mph). He convened a "Committee on Designs" to evaluate the alternative designs and to assist in the detailed design work. One ancillary benefit of the Committee was that it would shield him and the Admiralty from political charges since they had not consulted leading experts before designing such an extremely different battleship.