Anti Roll Tanks

Hello dear community,

I have a question about how to create an elevated anti-scratch tank in Maxsurf Stability Advanced, first to verify its free surface effect, the tank is located on the bow castle deck, the software does not recognize the total dimension of the tank, apparently it is out of your domain, how can I solve this?

Secondly, in Maxsurf Motions Advanced, I don't see any option to include anti-roll tanks, to calculate the new roll response.

Thank you,

I await your prompt reply.

ATTE.Heinz Bill Galdós Lindao