ABOVE HYDROPHONE 

 200 N. M. RADIUS 



400 N. M. RADIUS 



600 N. M. RADIUS 



800 N. M. RADIUS 



10 12 16 20 25 32 40 50 63 80 100 126 160 200 250 320 400 

 FREQUENCY, C/S 



Figure 8. Variation with frequency of coefficient of correlation between sound 

 pressure spectrum level and cumulative maximum wave heights observed at 

 the indicated radial distances. 



17 



