Hm. Might be worth taking a look at... I don't have the time to try testing it right now, though. Just as long as it doesn't turn into a "repair" turret.
But ships repairing other ships via a gun doesn't work... or rather, it does, but if a ship is full on health, it instakills the ship it should be "repairing". Obviously this could result in problems. Only thing a Carrier could do is have a ton of b/b that it can pass off to other ships, and Repair Ships already have that. Unless a Carrier is going to become a super repair ship? Maybe 8k b/b instead of 4k? That could get expensive...