Fluid overflow point for tanks / open holds in Maxsurf/Hydromax

Dear Sirs,

I would like to know if it is possible to define overflow point for fluids in Maxsurf modules.

In specific cases like the large angle stability of split hopper dredgers or trailing suction hopper dredgers which have open holds, we need to consider the reduction in displacement due to spilling of excess spoil at higher angles of heel. It is needed to consider that the fluid is lost to the sea. It appears that Maxsurf considers constant displacement at all angles of heel so it doesn't actually spill the spoil fluid.

Best Regards,
Devu