No, this was the original HMS Ark Royal, constructed in 1914 and had only 7450 BRT.
I think we start to talk aboutmore realistic aircraft carriers with the HMS Furious, HMS Vindictive,, HMS Argus.
For example Furious, completed in July 1917 had originally about 6 seaplanes I think Shorts and 6 Sopwith Pups, it was of 19100 BRT.
Vindicitive (so not the Vindictive of the Zeebrugge raid !) was completed in October 1918 and had only 9750 BRT.
Argus was completed in September 1918 and displaced 15774 BRT.
Some of the mentioned seaplane carriers were lost. *Campania was in a collision with HMS Glorious during a gale in the Firth of Forth on the 5th November 1918. *The Ben-My-Chree was sunk on the 11th January 1917 by gunfire from the Turkish guns protecting Kastelorizo harbour.
The sinking of the other Ark Royal is explained by Volker I just see, and the Oak Royal sunk by Gunther Prien of U47 was one of the spectacular starts of WW II for the U-boat weapon a bit the same way as Weddigen did with U9 when he sank the cruisers HMS Aboukir, Hogue and Cressy in less then an hour on the 22nd September 1914.
BTW I take every occasion I can to repeat once more that the U-boat war in WW I was much more spectacular then the one of WW II. *But their story is almost unknown.
Best from Johan *