And the as you go away from the main directions; obviously, the energy is less ultimately 90 degree it is less 0, because see if the wind blows from this side you do not expect any wave form this side. So, maximum wave will come from this side, little less here, little less here, little less here, ultimately 0 here and no waves of course, coming from this side, because winds are in this way (Refer Slide Time: 26:32) When you have this representation this is what is called a short crested sea. Because when you the reason I mentioned that is that again therefore, it has become algebra S 3 D becomes simply S 2 D into f theta.
Now, this is depends on, this depends on only H s and T this is only theta. So, you see although when you have gone to open ocean you find out waves are all kind of irregular and there are no crest, there it is all you know random the full thing can be nicely represented by knowing only the significant height peak period and spread function which is known.
And the as you go away from the main directions; obviously, the energy is less ultimately 90 degree it is less 0, because see if the wind blows from this side you do not expect any wave form this side. So, maximum wave will come from this side, little less here, little less here, little less here, ultimately 0 here and no waves of course, coming from this side, because winds are in this way (Refer Slide Time: 26:32) When you have this representation this is what is called a short crested sea. Because when you the reason I mentioned that is that again therefore, it has become algebra S 3 D becomes simply S 2 D into f theta.Now, this is depends on, this depends on only H s and T this is only theta. So, you see although when you have gone to open ocean you find out waves are all kind of irregular and there are no crest, there it is all you know random the full thing can be nicely represented by knowing only the significant height peak period and spread function which is known.
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