Autogyro - first ship landing/take-off - conflicting texts

[Leendert]

For my little autogyro research, I read conflicting texts when the first deck landing on and take-off from a ship has taken place with such a aircraft.

Sources say on 23 Sep 1931 on one hand (USN Pitcairn XOP-1 on the USS Langley) while others claim a (civil) Cierva C.30 on the Spanish seaplane tender Dédalo on 7 March 1934.
Not to disparage one above the other, which one bears more of the truth?

Thanks for info, Leendert