@victoryfirst
:+1: barnee answered your first question correctly. Thanks, barnee:relaxed: :right-facing_fist:
You can take damage hit on as many Aircraft Carriers as you want - before (if) any of your Battleships gets damaged.
Normally you would choose to take hits on your Battleships (and Heavy Battleships) before having more Aircraft Carriers damaged - simply because you want your Fighters to land on your Aircraft Carriers, since this would give you the strongest defense.
Naturally, if you have “empty” Aircraft Carriers - and no reserve Fighters to bring forward to meet up with your Aircraft Carriers, you might want to take hits on those empty Aircraft Carriers:+1: