Absolutely gorgeous Karel!
But I see an awful flaw. Sorry.
You've done such a fantastic job on the armament, and the railings, and everything else so far in those pictures, that it sort of emphasizes that the deck is just plastic. Compared to to the terrific detail on the guns, the deck just doesn't stand up to the quality of the rest of it.
Please, please, do what I did (for a different reason, but same end result) and scrap the plastic deck and build your own deck out of real wood slats. It makes a huge difference for realism and with the detail of your guns, you'll be really happy with the result to go with them.
I'm making my hatches open, but you don't need to do that to get the same appearance. But having real wood decks, with the correct spacing between each slat to let the 'water' come through when it dives, and seeing the beams underneath the deck will really set off the beautiful work that you've done so far.
If you can't get wood slats there, you can get them from Lee Valley in Canada. They have cherry wood slats, 36" long by just a few mm wide and not much thicker than paper. Real easy to make a deck out of. When you scuff off the carboleum on the worn parts, you'll see real wood grain showing through. Your model deserves it with the detail you've done so far.