So, what you do? By design you must choose a natural period T z, which is far away from this 6 to say 12 seconds, far away. Now, if I want to do, we we keep on writing this all the time. Remember, this is geometry, this also is geometry, but this is much more geometry. Actually, it is geometry of water plane area, this one c z A w p. So, what we could do? If I want to make it lower, I have to increase it. So, I become like a barge, but that is not very practical we will find out. What we can do? We can make it much higher. So, if I want to make it much higher what I should do, I should lower this. So, my objective is lower c z means lower A w p.