I always dive, every single time, unless I'm somehow forced to be on the surface due to damage. Only as a last, defiant act before dying would I even consider engaging an aircraft with the flak gun. I feel the same way about using the deck gun against destroyers. I just don't do it.
For me, the only purpose of the flak gun is the entertainment value of using it on small coastal vessels - fishing trawlers and the like. There is something very satisfying about having a small fishing boat meandering towards you, never knowing that his doom lies near. You then quietly surface as close as possible - within 100m - and proceed to machine gun him into the next world.
|