Hi, im not sure if this should go in the mod forum, but this was just an idea of how to make a carrier for gal civ.
Basicaly the carrier who have 2 modules added. Fistly a module that increases the area ships can fly in (like adding another starbase) whilst not effecting the range ships with this module equiped can fly.
The size of area i am thinking of is the sector the carrier is in an all a jesent sectors.
The second module would be a fleet repair one which would just increses the rate of repair.
The idea behind this is that the carrier ships would be upgraded with all ships support mods and range increase mods and it would then project an area around it that smaller ships can fly in.
Im sure this kind of thing is possible with the mod make i just dont know how. 
Thanks