Pitch (GWX2)
 

In the St Nazaire pen, at stop, the sub pitch too much; it's just impossible to pitch so much like that, so there is a problem about the "mass" or the weight of the sub, or still with the design of the hull ..;

Wave action in SH3 causes it to happen with stationary objects. You can watch it increase with time.

Once you get underway it stops.

ok, thank you