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Sure... You need Carrier Aircraft Diversity (air doctrines tech) to unlock it. In turn, you need the larger carrier techs to unlock that one, which implies you research the Post Treaty Warship Development Doctrine, IIRC.
am really enjoying the mod but am having the same problem as the original poster - how to unlock 1936 Naval Air Arm - the tech seem to have changed and Patrol Bomber doesn't say that it unlocks this tech