120 



110 

 100 

 90 

 80 

 70 

 60 

 50 

 40 

 30 

 20 



























































































N 

































\, 





SI 



eovy 

























\ 



V r 



H 



k 























y^ 



>N 







e ■ 



:^ 



1 



^-^ 



Beoufoft 

 wind f ofce 











■N 



Light- 



"V 



" 





^' 



^^ 



>> 



>^H 



^h- 



^ 



V 







Wind speed 



, knots 







^ 





1 



.>< 





\i 



\f- 



\^ 



C>^i^ 



Seo 











X' 



,^' 



\ 



^ 



^ 







slote 













•'' 





\ 



\^^ 



""'"'"■^'^ 



«-v^ 



r^ 



!^ 



















\ 



\ 



—- 





^ 



-^^ 



w 























""■^ 





__LJ_ 



JJJl 





__L_L. 



JJJJL 





„JLi. 



JXU 





_-,uiJa.uj 



---' 



..JlJ^ 



,.U,.M 



tOO.000 



Frequency, Ki 



Figure 5. Average deep-water ambient noise spectra. 

 Spectrum level is the level in a one hertz 

 band (Urick, 1975) (after Wenz, 1962). 



G-48 



