I'll check, but most if not all setups have ack lethality set to 0.7, which I believe is standard, just like the MA.
I will check the lethality settings and adjust them if they are off.
Just my own opinion alone, and not gonna say the rest of the CT Staff agree with me, but in setups with lots of fleets, like this, I'd rather turn the ack lethality DOWN to about 0.3 or 0.4 to make fights more survivable and reduce the tendency many folks have to run to the ack umbrella at the first sign of an enemy plane.
Of course, if HTC ever tried what I suggested three years ago, it would bring a whole new level of immersion to the game: Make the fleet acks commandable, i.e. the fleet commander would have the ability to turn the acks off, much like Brand W's auto gunner mode where you could set the auto gunners to SAFE and they would not fire. At the same time, the auto acks would not differentiate between friend and foe, and you would be in as much peril as your enemy if you got caught in the ack umbrella.....just like in RL.....how many stories have you read where the Germans threw up a wall of flak over a target city, and the LW pulled off and waited til the bomber boxes were clear of that before attacking again? And I read pilot accounts of where USN pilots were warned to stay away from the carrier as it was under attack and they might be fired on.
Chances of HT and Pyro implementing something like that are probably slim, if not nil, but IMHO it would add to the realism of the game.