In 1905 the British Admiralty approved plans for the worlds first dreadnaught. The first battleship to be powered by Turbine propulsion system, which gave her a speed of 21.5 knots during her trials, which compared to the earlier battleship speeds of 17 to 18 knots. It took just one year to complete the construction of HMS Dreadnaught, from the beginning of laying her keel to the ship being completed and only six months later she entered service.  HMS Dreadnaught was the flagship of the the 4th battle squadron at the outbreak of world war One and on the 18th March 1915 she rammed and sunk the German U-Boat U29in the North Sea.  HMS Dreadnaught missed the Battle of Jutland as she was in refit due to her poor condition and in August 1917 she was transferred to the Navy Reserve. Finally sold for breaking up in May 1921 and finally scrapped in 1923.