First, thank you for your replies guys, it's always a pleasure to find help on this great forum !
@ HW3
Yes, I've already tried this, but I've not been satisfied of it at all.
@ The Frog
No, I didn't notice a difference with your new destroyer. But your answer helped me to find the solution ! Indeed, I thought that submerged displacement and draught concerned only submarines. As soon as I read your explanation, I immediately realized that I was wrong and thought to myself : Eureka ! That's it ! I immediately specify a submerged displacement. And that do the trick !
Then, I tested different solutions, and my conclusions :
- the surfaced displacement must be inferior to the submerged displacement, otherwise, the hull is sinking in the water.
- to delete completely shaky movements, the submerged draught must be setted to zero.
The values for your destroyer that are OK for me yet :
I've tested the ship's behaviour also with rough weather, and it seems to go well. I don't remember the original values of your destroyer, could you send them to me please ?
F.