Hi I have added another detail I wanted a mod to your thinking, let it deserves or not?
now on the surface of the turret hatch will remain open when you reached the 7-meter dive will close
when it emerges attained 7.5 meters will open
Attach photos of explanation, let me know if you find it a stupid idea or you can work in this direction
I must find a way to put something over the hole to simulate day and night and how to change it.
regads
luca