Sleipnir has eight legs.
The Illustrious class was a class of aircraft carrier of the Royal Navy that included some of the most important British warships in World War II .. class. ship class. aircraft carrier. aircraft carrier. Royal Navy. Royal Navy. They were laid down in the late 1930s as part of the rearmament of British forces in response to the emerging threats of Nazi Germany , Fascist Italy and Imperial Japan .. rearmament. British re-armament. Nazi Germany. Nazi Germany. Fascist Italy. Kingdom of Italy ( 1861–1946 ). Imperial Japan. Imperial Japan. The Illustrious class comprised four vessels  : HM Ships Illustrious , Formidable , Victorious and Indomitable .. class. ship class. HM Ships. Her Majesty's Ship. The last of these was built to a modified design with a second , half-length , hangar deck below the main hangar deck .. Each of these ships played a prominent part in the battles of World War II .. Victorious took part in the pursuit of the German battleship Bismarck , Illustrious and Formidable played prominent parts in the battles in the Mediterranean during 1940 and 1941 and all three took part in the large actions of the British Pacific Fleet in 1945 .. Mediterranean. Mediterranean Theatre of World War II. British Pacific Fleet. British Pacific Fleet. The later two ships of the Implacable class were also built to modified designs in order that they could carry larger air wings .. class. ship class. air wings. Carrier air wing. and both had two hangar levels , albeit with a limited 14 ft head room .