HMS "Erin was a dreadnought battleship of the Royal Navy which was originally built in response to an order placed by the Ottoman government with the British Vickers company.
 She was intended, when accepted for service in the Ottoman Navy, to be named Reşadiye", as the first of two "Reşadiye"-class battleship s.
 The Ottoman intention was to procure a battleship which was at least the equal of any other ship currently afloat or building.
 The design was based on that of "King George V" , but with some features of "Iron Duke" .
 In August 1914, when the First World War broke out, the ship was nearly completed; but at the orders of Winston Churchill, the First Lord of the Admiralty, she was seized (together with another dreadnought battleship under construction in Britain for the Ottoman Navy, "Sultan Osman I", which was renamed as HMS "Agincourt" ) for use by the Royal Navy.
The "Nassau" class were a group of four German dreadnought battleships built for the Imperial Navy.
 They were the German response to the introduction of the "all big gun" British HMS "Dreadnought" .
 The class was composed of "Nassau" , "Rheinland" , "Posen" , and "Westfalen" .
 All four ships were laid down in mid-1907, and completed between May and September 1910.
 Compared to their British contemporaries, the "Nassau"-class ships were lighter and had a wider beam.
 They were two knots slower, because the German ships retained vertical triple-expansion engines as opposed to the high-power turbine engines adopted by the British.
 The ships also carried smaller main guns—11-inch (280 mm) guns rather than the 12-inch (305 mm) guns mounted on the British ships.
Dreadnought was a 41-gun galleon of the Tudor navy, built by Mathew Baker and launched in 1573.
 Like HMS "Dreadnought" of 1906, she was a radical innovation over contemporary ships.
 When John Hawkins became Treasurer of the Navy in 1577, he had sailed all over the world, and his ideas contributed to the production of a new race-built series of galleons - of which "Dreadnought" was the second (following "Foresight" of 1570) - without the high fore- and after-castles prevalent in earlier galleons; these "marvels of marine design" could reputedly "run circles around the clumsier Spanish competition."
USS "South Carolina" (BB-26), the lead ship of her class of dreadnought battleships, was the fourth ship of the United States Navy to be named in honor of the eighth state.
 She was also the first American dreadnought; though she did not incorporate turbine propulsion like HMS "Dreadnought" , "South Carolina"' s design included revolutionary aspects as well, primarily the superfiring arrangement of her main battery.
 The ship was laid down in December 1906 and launched in July 1908 before being commissioned into the US Atlantic Fleet in March 1910.
HMS "Dreadnought" was a battleship built for the Royal Navy that revolutionised naval power.
 Its entry into service in 1906 represented such an advance in naval technology that its name came to be associated with an entire generation of battleships, the "dreadnoughts", as well as the class of ships named after it.
 The generation of ships it made obsolete became known as "pre-dreadnoughts".
 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 in guns and a speed of 21 kn .
 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 that they had not consulted leading experts before designing such a radically different battleship.
The "Deutschland" class was a group of five pre-dreadnought battleships built for the German Kaiserliche Marine.
 The class comprised "Deutschland" , "Hannover" , "Pommern" , "Schlesien" , and "Schleswig-Holstein" .
 Built between 1903 and 1908, the ships closely resembled those of the preceding "Braunschweig" class , though they had stronger armor protection.
 They were made obsolete before they were even completed by the launch of the revolutionary Royal Navy battleship HMS "Dreadnought" in 1906.
 As a result, they were the last ships of that type built for the German Navy.
 They were followed by the "Nassau"-class battleship s, Germany's first dreadnought battleships.
The "Valiant" class were a class of nuclear-powered fleet submarines in service with the Royal Navy from the mid-1960s until 1994.
 They were the first fully British nuclear fleet submarine; the earlier HMS "Dreadnought" used an American nuclear reactor.
 There were only two boats in the class, the first, "Valiant" (the nameship) commissioned in 1966 three years after "Dreadnought", and "Warspite" the following year.
 Both were built by Vickers at Barrow-in-Furness.
The battlecruiser was the brainchild of Admiral Sir John ("Jacky") Fisher, the man who had sponsored the construction of the world's first "all big gun" warship, HMS "Dreadnought" .
 He visualised a new breed of warship with the armament of a battleship, but faster, lighter, and less heavily armoured.
 The first three battlecruisers, the "Invincible" class , were laid down while "Dreadnought" was being built in 1906.
SMS "Nassau" was the first dreadnought battleship built for the Imperial German Navy, a response to the launching of the British battleship HMS "Dreadnought" .
 "Nassau" was laid down on 22 July 1907 at the Kaiserliche Werft in Wilhelmshaven, and launched less than a year later on 7 March 1908, approximately 25 months after "Dreadnought".
 She was the lead ship of her class of four battleships, which included "Posen" , "Rheinland" , and "Westfalen" .
HMS "Colossus" was the lead ship of her class of two dreadnought battleships built for the Royal Navy at the end of the first decade of the 20th century.
 She spent her whole career assigned to the Home and Grand Fleets, often serving as a flagship.
 Aside from participating in the Battle of Jutland in May 1916 and the inconclusive Action of 19 August, her service during World War I generally consisted of routine patrols and training in the North Sea.
 "Colossus" was the only dreadnought from the main body of the Grand Fleet to be hit during the Battle of Jutland, although she suffered only minor damage.
 The ship was deemed obsolete after the war and was reduced to reserve and then became a training ship.
 "Colossus" was hulked in 1923 and sold for scrap in 1928.

Question: What is the HMS Dreadnought?
Answer: battleship