The Hydrostatics command has an error. The calculated Water Plane Area and Center of Floatation do no account for the presence of voids in the waterplane area. The other results from Hydrostatics appear to be correct. See the attached example. PedroAfonso found this error. See [this post][1]
[1]: Hydrostatics for Jackups - Legwells not considered Hydro3.3dm (351.7 KB)