Talk:Combat/@comment-100.1.75.29-20140319213622/@comment-861160-20140320091921

Yes, it sums over all equipment slots in the fleet, thus the name fleet anti-air bonus.

The 50% roll and # shot down calculation is performed for each enemy bomber slot. A 100 AA ship would recieve a fleet AA bonus of 3 from a single type 3 shell equipped to a different ship, however it would only shoot down 21 planes regardless of if the type 3 shell existed or not due to the rounding. Nonetheless, for 24 bomber slots of 10 each you can expect to shoot down around 120 planes on average, since if the roll succeeds all 10 in the slot would be shot down.