RAW = Says nothing about air units, just “additional units”.Â RAI = Means air included.
It says nothing explicitly about sea units, either. The type of units is unspecified, implying that any type of unit that may legally move there is allowed.
RAW = Can not move into a territory unless it’s occupied by enemy forces.Â This would include sea zones that don’t scramble.
An exception for an amphibious assault where scrambling may occur is explicitly made here.
If you don’t scramble and don’t have any enemy forces and don’t amphibiously assault, moving airplanes into that sea zone is not a valid move.
RAI = You can always bring air into sea zones just to cover what if’s.
No. RAW = You can always bring units (sea and/or air) into sea zones from which you’re doing an amphibious assault, if there is a potential for the defender to scramble.