Hello , this is my first post here, I'm building a Goat Island Skiff. Now, in order to register the boat, I must submit to the maritime authorities the boat's plans and "a stability study of the vessel that supports its seaworthiness under different sail trimming conditions." The designer does not provide this latter requirement, so I used Freeship, managed to draw the hull, but I’m not really sure if the results it gives me are accurate. I'm struck by the shape or outcome of the curves the program shows me, and by the fact that it doesn’t provide any information for the stability diagram or the results. My question is: is the model properly drawn/defined? Is that the reason for such strange curves? What am I doing wrong—or is everything actually fine? Can I extract from this the information I'm required to submit? Anyway, I understand I’m asking a lot. But if someone would be kind enough to give me a hand and guide me a little, I’d be very grateful. I’m attaching the Freeship model and some results. Best regards. Mario PD: cant upload the .ftm file