I hadn't received a direct hit from a deck gun for awhile and although the texture looks ok on the boat there is this cloud that follows just above, & when you dive this cloud floats just above the water but doesn't show above the horizon:

Doesn't happen with ships only U-Boat, probably something to with the fact that the damage can be repaired on U-boats! Could it be the Particles.dat or Particles.dsd file?
Not sure what mod I am looking for, anyone know about this problem and a fix?