Take an offshore structure, my offshore structure is here. Now, I will we will you will know why offshore structure designs are actually primarily guided by natural period unlike ships, where you are designing by you know by carrying capacity and as a much more fundamental parameter. In your design courses, you will find that natural period of a ship is never occurring at the primary design; you have not even talking about it. After you have done you talk about how much natural period, but you do not use. If you are you are doing another course, you do not even use it as an input important parameter for your design, but in offshore structure you cannot do that absolutely. Why because you see here, this one is staying in one place throughout, while you have to have small heave motion therefore, you cannot afford a situation where some wave will come, which will resonate, because you cannot get away from it.