I don't understand Italian but there is a mod called "The Depthcharge Shake mod", this will shake the boat around and you will hear moans & groans from the crew, this mod is incorporated into the LRT (Longer Repair Times) mod, but you can just use the depthcharge shake part if you want, just do a forum
search or for some personel help just PM me.
(If this mod is what your after)
Cheers.