In other words, a flat barge would have a larger added mass, heave heave motion and a narrow a frigate type of ship would have smaller added mass, but if even if you take this, it might be in this case a z bar might be as much as 3; this may actually be may be something like 1. So, it is in this order 1, 2, 3. You can always work it out because you know these things are all; you imagine yourself a kind of a semi circular box, mass of that with respect to the mass of this. It is see what is block coefficient? Mass of the rectangular block. What is prismatic area coefficient? It is area of mass of this kind of this mid ship area throughout.