First of all, let me make one thing absolutely clear: this mod ROCKS!!! Hats off to you for making SH4 ultra realistic experience. The ocean looks so real that I have to stop my head from banging into the monitor because I want to jump in....
There is one thing I would change though and I would like to know how other simmers feel about it: I think that in order to make the enviroment ultra-realistic you have overkilled it a little bit in making the night a little too dark. I have seen ocean at night multiple times and, honestly, it will never get so pitch black. Not even on moonless nights. It hinders the gameplay.... Considering that most of the submarine attacks in WW2 took place at night and the real commanders had other things to rely on, like extra three pair of eyes on the watch, they could smell exhaust fuel of the ships etc. attacking ships gets extremely frustrating with your mod at night.
Don't take me wrong. In no way I intend to slam your mod, you have done a hell of a job but sometimes it is a litlle bit better to ease up on the realistic part for the sake of a gameplay....
What do you think?