What I am saying therefore is that see, that one way of doing added mass is that go to those charts and tables, where the added mass coefficient alpha and damping coefficient beta; if I call this added mass coefficient and this damping coefficient as a function of; obviously, it is function of omega e, which you of course, work on based on d beta and for the ship part it is based on a sectional area coefficient beta n and B n by t. This is sectional area coefficient, this of course is sectional width, breadth coefficient you can say; these 2 parameter. So, what happen?