[REL] VIIB hydro&speed fix

[Furia]

I am always thankful for modders to help to improve the games.

Thanks.

However, I have to say that the fact the sub needs some forward movement to keep the sub trimed it is true.

Usually those subs had a slight negative buoyancy that was countered with the use of the dive planes and some forward speed even a minimum one.

Anyway I am sure some TC lovers would appreciate this MOD