A few corrections.
If a transport has the "tactical missile only", it means it can transport a unit which has the "tactical missile".
So by giving the "carry foot only" AND "carry tactical missile only" to a unit, you make it unable to carry anything. Give it a transport of 1... and it cannot be loaded into anything... And you get land based aircraft, that cannot be based on aircraft carrier.
I think Tactical missile + foot allows a unit to load on transport with "tactical missile only" OR "foot only"
If a transport has the "tactical missile only", it means it can transport a unit which has the "tactical missile".
So by giving the "carry foot only" AND "carry tactical missile only" to a unit, you make it unable to carry anything. Give it a transport of 1... and it cannot be loaded into anything... And you get land based aircraft, that cannot be based on aircraft carrier.
I think Tactical missile + foot allows a unit to load on transport with "tactical missile only" OR "foot only"