2 ways to do that.
1- talk to the terrain editor folks so they make a terrain where carriers spawn close to eachother
2- you take comand of the carrier you want to take off from make it spawn close to were the enemy cv is
in the second one the mission creator would make it so you take off from an airfield and then warp to the coordinades were the encounter is going to happen.
I think the first option would be more confortable to everyone wanting to experience a carrier vs carrier mission because they would have to move their carrier by themselves and there is more chance to the mission going rigth. if you can talk to someone on the terrain aditor to make a terrain with sea and enemy CVs close to eeachother then i can give it a try and make the mission for you!