Proof!!

[Tessa]

Originally Posted by VONHARRIS

There is no chance to sink a BB with just a 88mm deck gun. A single shot of the 16 in guns of this monster will tear the sub apart even in the stock version not to mention with GWX. There , and at this close range your sub will be filled with 16in holes and you will end up as fish food. I have never tried this even with stock version only. It must have been a bug there.
Amazing : Mexican stand off between a sub and a BB! Wow!!

The 16 inch guns typically have very poor aim, haven't been hit by one in a situation where I was surfaced near a battleship. Its all the small faster ones that have near machine gun speed that tear your boat apart 99% of the time.