Talk:Tutorial: FAQ/@comment-180.253.220.31-20131124094718/@comment-114.160.71.150-20131125080655

Anything that can attack subs will do so whenever a sub is present. CVs can't attack subs, but CVLs and AVs (or at least AVs with seaplane bombers) can.

And they stop launching planes because the flight deck is too damaged at medium  and high damage to launch planes quickly. Best emphasized with Ryuujou, Hiyou and Junyou, as their flight deck is a scroll which at medium damage is completely destroyed. They'll still participate in the initial bombing attack though.