Today i accidentally rammed a tugboat with a IXb, ahead full. Was lining up for a deck gun attack and too late realized they were too close. Anyway, the tug flipped upside down and continued sailing on, not sinking, comletely inverted. It sank eventually and i got no credit, but that's no big deal. Still, how on earth would that boat sail upside down? Don't tugboats have really heavily ballasted bottoms to prevent just that?