FOREWORD 



Recent developnents in the studjr of ocean waves have 

 stimulated interest in the prediction of pressure fluctuations 

 at the ocean bottom caused by ocean vjaveso Although there is 

 considerable literature on the exponential decrease in wave 

 motion downwards from the surface, newer concepts of wave analysis 

 at depth based on the power spectrum concept have scarceljr been 

 touched* This paper is designed to fiU in some of this gap of 

 knowledge and to provide a method for estimating bottom pressure 

 from a given surface wave power spectrumo 



This developmenial paper is an interim step in the Uo S« 

 Navy Hydrographic Office's continuing program for developing 

 suitable wave forecasting methods for xise by commercial and 

 military activities o 



J. B. COCHRAN 

 Captain, U<. S. Navy 

 Hydrographer 



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