This is one simple way of doing. Of course, it does not answer the question about how do I get omega e because you know it is not differentiating between same omega e’s arising because of different combination of this because it is only a function of one parameter omega e. This is one problem, means there is an approximation. The second thing is that; obviously, here I do not have the ship moving. You imagine this part also that this ship is oscillating at period 10 second.