[Mobhack]

There really is no such thing as a "para based campaign" other than perhaps a user campaign where the designer has set up one.

Why? - because you cannot have the certainty of air support, so transport planes aren't guaranteed. Nor can you have core forces with air transport units. So it has to be a user campaign, where the designer has set you up with air support points on every battle, so you can buy air transports.

A naval assault scenario is meant to be based around going ashore in boats. Hence, assault craft will be provided for your troops to go ashore in and the troops will be loaded into these. If you choose to buy air transports from your air points, then you will have to unload any troops from their boats and load the troops onto the air transports manually.