



On 18 March 1915, while so employed, she rammed and sank the German Submarine U-29. Dreadnought served with the 4th Battle Squadron in the North Sea during the first two years of World War I. The new battleship served as Flagship of the Home Fleet in 1907-1912 and remained part of that fleet thereafter. Dreadnought was commissioned for trials a year after her keel was laid and was completed in December 1906. Laid down in October 1905, she was launched in February 1906, after only four months on the ways. The swiftness of her construction was equally remarkable. Her "all-big-gun" main battery of ten twelve-inch guns, steam turbine powe rplant and 21-knot maximum speed so thoroughly eclipsed earlier types that subsequent battleships were commonly known as "dreadnoughts", and the previous ones disparaged as "pre-dreadnoughts". She represented one of the most notable design transformations of the armoured warship era. HMS Dreadnought was an 18,110-ton battleship built at Portsmouth Dockyard.
