Ok thanks,
so then if the carrier is damaged or destroyed then plane is awarded 1 space to find a suitable landing space else lost?
That’s correct.
You’re right, the exact quote is:
In order to demonstrate that an air unit might have a safe landing zone, you may assume that all of your attacking rolls will be hits, and all defending rolls will be misses.
Maybe I’ll have better luck double-checking the sub rule: since the surprise attack OR submerge round comes before the general combat round, you could in fact start a battle with a sub against a DD-free opponent with no intention of finishing the fight since the sub is free to submerge before any opponents fire.