Leutnant_Werner, Welcome!
Very good! This is not an easy task as I worked on slow and bigger waves myself. (try:
http://www.subsim.com/radioroom/showthread.php?t=185646)
The trouble is that the ship in the movie is already almost floating. In periscope view this gets worse up to the point that it will jump. Other problem is that the bridge is going to be submerged too often when the sub is cruising at the surface. There is a kind of maximum to which you can enlarge the waves. Above it you will get side effects.
But I will certainly try it when you are finished!