Stability of Damage Maxsurf is used to calculate the weight of a carrier.

Hello, I am Maxy from Ladhani Metal Corporation

I need to use Maxsurf to test the damage stability of a small carrier with a capacity of around 550 MT.
I'm looking for advice . Which one do I need to take?
Is it an IGC code or another? The carrier resembles a barge, with the tank installed above the main deck.