Friendly ack should be just as dangeroys as enemy ack ack/flak stop Hiding in it. Did that happen IRL
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According to the OP, the 2 hellcats were not hiding in the ack, but were trying to shoot down the bombers attacking the CV...
IRL, usually ship-borne AA kept firing when the CAP pursued into it. Based on what I've read, the CAP usually but not always survived.
MH