*** Official SH4 patch 1.3 Update straight from the horse's mouth ***

[Lt. Cobra]

One thing that was not mentioned in the list that may be a minor point for some but for true blue simmer of this game it is not.

the camera in the conning tower tilts the opposite of the motion of the boat. When diving, the camera tilts down aftward, when surfacing the camera tilts up Aftward. If you stand facing the ladder to the bridge – you are facing starboard. When diving the conning tower SHOULD appear to tilt downward on your left (which is the bow of the boat) instead the effect is reversed. Noted on the porpoise and salmon classes.

But WHATEVER you choose to do, Ubi, please fix the CTDs!