Just thought I'd mention here, last night I sank an A&B Class with my deck gun. He caught me on the surface rearming with external torps and I had 3 minutes left...I decided to gamble and stay surfaced. I go flank and take off, but my IXB is no match for his speed. I spin around, more for fun than anything else, and zig-zag toward him. I open up at 6000m. After adjusting my aim, the next two shells are directly on target and the destroyers is engulfed in a massive explosion. One more shell for good measure and down she goes...must have left some shells exposed on the deck
(could the 10.5 cm gun penetrate armor like that on a destroyer? I assume I must have hit her forward magazine).
I would never do this in my DiD career...but no harm done + another hunter out of the game for good.