Another thing I noticed. As I was sitting on the bottom of shallow water and getting POUNDED by a DD I watched my men in the control room be thrown back and forth, back and forth. Uber cool. They didn't look like they were enjoying it, either.
Good attention to detail, that. Something other than the magnetically glued feet and internal gyroscopic gimbals the control room crew of SH3 has, no matter how the sub shakes and shimmies.