@Hepps Never tested, but I'm sure, yes, it should support whatever, and there is no way that who trasported who can matter at all, when you are making combat. Guess you are thinking at paratroopers stuff.
The isMarine is the only thing that can turn strategical movement into tactical power.
No this wasn't intended to be used for paratroops. Support mechanisms were worked out fairly well in TWW for them.
It was more for the Leadership units I have created... because for naval purposes I would rather not have a separate unit for Leaders... but instead have surface vessels capable of carrying a Leader and then have the support effects transfer to the "transport" vessel and any other vessels capable of receiving support.