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ABSTRACT 



This report discusses the general problem of recording and 

 analyses of wave, submarine, and fluid motion data obtained 

 from the USS REDFIN while hovering at keel depths (near 100 

 feet) at different relative headings. In particular, the problem 

 of recording surface wave heights with the Sonic Surface Scan- 

 ner is discussed. Power spectral estimates obtained by both 

 analog and digital methods are presented. Composite graphs 

 of power spectra of data are presented, and mean values of 

 the motion are given in tabulated form. 



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