Friendly fighters belonging to other nations on your AC always “ride” the AC when you move it on your turn, and are treated as cargo, destroyed if the AC is sunk.
Your own fighters have the option of being treated like this as well. As soon as the AC moves, any fighters on it become cargo and remain such for the remainder of your turn. Technically your fighters are supposed to lift off the AC before it moves in order to have their own movement or combat-participation. The format is in place to nullify improper fighter range-extension. Making a habit of moving your fighters before touching your ACs makes the issue go away.
Mind you, every player I know is completely cool with the convention that if an AC is pushed into a combat, the same-nation fighters on it are “in the air and fighting”. Nobody is picky about actually picking up the fighters individually and flying them to the SZ, then sailing the AC in. Actually, quite the opposite. :lol:
~Josh