http://www.subsim.com/radioroom/show...=192236&page=3
In this thread You'll find a list of mods (post 1) that improve game immersion grately.
Also recommend Sober's or Night's underwater mods that should be applied after Dynamic Env. v.2.1 (read previous post) mods and to choose one on them You find more realistic.
After that You'll understand that Magnum Opus is really outdated
