OOI 0D2 0.05 0.1 0.2 0.5 1 2 5 

 Frequency, kHz 



10 20 



100 



Figure 2. Attenuation coefficients in decibels per kilo^ard 

 as a function of frequency for sound propagation 

 in sea water (Urick, 1975). 



G-45 



