Hang on. Having flown 139 I can tell you it won't cope with navy deck landings. Yes we have landed offshore on moving decks but not on frigates. Totally different scenario. Navy decks require SHOL which the 139 doesn't have. The 365 does. H160 might soon courtesy of French. H225 even.
Not even sure a 139 with it's nose up attitude could even cope. None certified with 16 pax either. Where did these guys get that from? Sounds like an inside job to me. Is that legal?