@Henz:
yeah my main thought was taking extra planes into a combat expecting to lose some but land the remaining ones after
All planes need to have a legal landing space following the assumption that you will lose nothing and your opponent will lose everything. After combat, all planes MUST land IF they can. So you cannot send 4 planes assuming 2 will die and only having a landing space for 2.
Following the assumption that you will win every battle with zero losses, it is possible to send planes into a fight and in a seperate seazone send a single unit to clear out a massive stack which would (if you were to win) clear the way for carriers to move in noncombat to provide a space. In that instance, the sub would likely die, and the planes would also likely die as they no longer have a legal landing space in the noncombat phase. That’s the only way to legally send planes on a one way mission.