In the past I have edited my storm conditions so that I could make the decision as to what is too rough, but at the same time did not use the tweak to run wild, with my crew six feet underwater firing the gun. My rationale is that the flak guns are higher than the deck gun and not swept by waves to the same extent the deck gun is. In theory it should be possible to use the flak gun when it is a bit too rough for the deck gun, but as you say, how effectively? On the Type II's, the flak gun is mounted on the deck so I use the storm condition as if it were a deck gun.
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