If you got a Kill mesage most likely it was a maned 5inch gun that nailed you.
The Fleats on this map are Big, they nead to be to suport the Allied sea based air units, since their are more ships in a fleat, their is as a result more Flak producing platform's, so we have denser flak envelops as a result, this means that thier is a greater likelyhood of being hit in the first place by this Flack, their is no way to adjust this, save sinking one or two of the enmy ships in a fleat which realy reduces the flak, or at least seams to.
My advice is to stay low, under the Flack envelope, or stay out of it.