HMS Caroline is a decommissioned light cruiser of the Royal Navy that saw combat service in the First World War and served as an administrative centre in the Second World War. Caroline was launched and commissioned in 1914. At the time of her decommissioning in 2011 she was the second-oldest ship in Royal Navy service, after . She served as a static headquarters and training ship for the Royal Naval Reserve, based in Alexandra Dock, Belfast, Northern Ireland, for the later stages of her career. She was converted into a museum ship. From October 2016 she underwent inspection and repairs to her hull at Harland and Wolff and opened to the public on 1 July 2017 at Alexandra Dock in the Titanic Quarter in Belfast. Caroline was the last remaining British First World War light cruiser in service, and she is the last survivor of the Battle of Jutland still afloat. She is also one of only three surviving Royal Navy warships of the First World War, along with the 1915 monitor (in Portsmouth dockyard), and the , (formerly HMS Saxifrage) usually moored on the Thames at Blackfriars but as from February 2016, in Number 3 Basin, Chatham. Construction HMS Caroline was built by Cammell Laird of Birkenhead. She was laid down on 28 January 1914, launched on 29 September 1914 and completed in December 1914. Caroline was part of the early sub-set of C-class light cruisers built without geared turbines and subsequent comparisons with later vessels of the same class demonstrated the superiority of geared propulsion. Carolines machinery is still in place today, although not in working order. Operational history First World War Caroline was commissioned on 4 December 1914 and served in the North Sea throughout the First World War. Upon commissioning, she joined the Grand Fleet based at Scapa Flow in the Orkney Islands, serving as leader of the 4th Destroyer Flotilla. She was part of the Grand Fleets 1st Light Cruiser Squadron from February to November 1915. In early 1916 she joined the Grand Fleet's 4th Light Cruiser Squadron and remained with it, fighting as part of it at the Battle of Jutland on 31 May – 1 June 1916 under the command of Captain Henry R. Crooke, through to the end of the war in November 1918. From 1917 until late 1918, she carried a flying-off platform for the launching of Royal Naval Air Service