There are some very nice sounds in your mod! Certainly a professionals work
I will certainly add some to my game.
But why did you add echo to some of the sound files? The boats are crowded with equipment, provisions and men, so you won't hear any echo. I can only say this for a Type VII (U-995 in Laboe), but I guess it's the same for all boats.
In case you are remixing the sound some time, I would suggest to take out "jawohl herr kapitän!", like nippelspanner already said.
If you need help with translations or are lacking some german words, you can PM me.
Regards,
Mr. Fleck