And, when we calculated the D by L, D by L is 0.004. Now, D by L is less than 0.2. So, that is a condition for the application of Morison equation, which is now valid. In addition H by D should be greater than 1, what happens if H by D is less than 1? If H by D is less than 1, then the drag component will become quite negligible. But if it is greater than 1, you need to know that both the inertia as well as the drag component will be contributing to the total wave force acting on the structure.