Builder: Armstrong Whitworth – Elswick Yard, Newcastle-upon-Tyne.
Yard number: 858
Laid down: 20 February 1913
Launched: 8 June 1918
Acquired: Purchased, 28 February 1918
Commissioned: 20 February 1924
Identification: Pennant number: 94
Fate: Sunk by U-73, 11 August 1942
Ordered by Chile as the Almirante Latorre-class battleship Almirante Cochrane, she was laid down before World War I. In early 1918 she was purchased by Britain for conversion to an aircraft carrier; this work was finished in 1924. Her completion was delayed by labour troubles and the possibility that she might be repurchased by Chile for reconversion into a battleship, as well as the need for comparative trials to determine the optimum layout for aircraft carriers. The ship was initially assigned to the Mediterranean Fleet and then later to the China Station, spending very little time in home waters other than for periodic refits.