I’m using free version, modeled a dinghy hull.
If I add some deck and bulkheads as layers some hydrositatic parameters changes (Dispacement ,Block , Prismatic coeff., LCB , LCF, KMt) even all other parameters same. Hull shape is exactly same, Why ?
By definition, the volume behind all submerged surfaces belonging to layers marked as hydrostatics layers are included in the calculation.
The solution to this is to disable the check box in the “Hydrostatics” column of the layer properties dialog for those layers.