Calcybel wrote:
...Submarines should have little or no air defense......
Stop
Stay away from the submarines if you don't know how they works, or how to work against them 
The values of the air defense from the submarines in this game, as well as the other attributes associated with submarines, are right and also important.
If the submarines would be further weakened in any way, they become a nearly defenseless and worthless unit and the game would lose a major strategic variant.
Why
:
You should try to see that this browsergame is not (and can not be) a "real simulation" but works on the principle of "Stone Scissors Paper", and that it is playable as a browsergame "the reality has to be adjusted" here and there.
In this game submarines has always come to surface for fight.
(Otherwise there would be a much too great whining of many players)
But a "significant weapon" of submarines is their invisibility.
So as compensation it's simulated by the fact that the two main enemies of the submarine must work together for an effective combat.
The navy bomber locates and the destroyer fights.
A well chosen compromise for the playability and balance how I think.
And:
Each alone, the destroyer as well as the naval bomber, in every level are in comparison just a little bit stronger as a sub. Both are faster of course.
But the destroyer cannot locate a submarine, however he has "Ranged combat water bombs" - a sub only has "Close combat torpedoes".
The naval bomber can locate submarines, but should beware of their AA - a naval bomber locates submarines every time, a submarine can never dive in front of a naval bomber, and like any AA also submarines air defense is reactive, therefore it only shoots back when attacked.
At the CoW-Oceans there is only a very coarse mesh of waypoints, so a located sub usually cannot escape, therefore the navy bomber only needs to observe occasionally, but not attack, and in the meantime destroyer/s can encircle the submarine/s.
So, a naval bomber forces submarines always to surface, a destroyer can use depth charge from a safe distance, additionally since some time we have aircraft carriers, and so even at high sea submarines are no longer "safe"...
...and a good admiral is able to sink enemy submarines without suffering any own damage, irrelevant how high is their AA.
Of course you can still beat up the submarines without any strategy and tactics - but then destroyers or own submarines are much cheaper than naval bombers.
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Please, don't worry for my horrible English language, I'm an old fucking Kraut and learned it while drinking beer with British soldiers in German pubs in the early seventies - so simply drink a beer and think you're in the pub, then you can read this without problems... 



