their are 7 total, and none involving carrier
seven is easy once you figure out that the enemy plane come in groups of two, once you shoot down the first two, its best to take a few shots at the zepp (which you dont have to shoot at the engines first like in the zepp mission but can shoot at the body as a whole), and then return to base to get the other two. Its pretty easy once you figure out practice enemy planes suck in a turn fight with a human