High Quality Content by WIKIPEDIA articles! HMS Furious (pennant number 47) was a modified Courageous-class cruiser built for the Royal Navy during the First World War. Designed to support the Baltic Project championed by the First Sea Lord of the Admiralty, Lord John Fisher, they were very lightly armoured and armed with only a few heavy guns. Furious was modified while under construction as an aircraft carrier. Her forward turret was removed and a flight deck was added in its place, so that aircraft had to manoeuvre around the superstructure to land. Later in the war the ship had her rear turret removed and a second flight deck installed aft of the superstructure, but this was less than satisfactory due to air turbulence. Furious was briefly laid up after the war before she was reconstructed with a full-length flight deck in the early 1920s.