Aircraft Captain is aircraft Captain, full stop. The take off and landing folk are obviously key, as are numerous other folk. But you have only one Captain.
I have to agree. ISTR the Maritime world had a number of Nav captains, and even - correct me if I'm wrong - AEO captains (there was at least one AEO Sqn Cdr).
So being captain does not
necessarily have anything to do with flying the aircraft???