BROWNING: ENVIRONMENTAL FACTORS AFFECTING LOW FREQUENCY 

 PROPAGATION IN THE OCEAN 



40 n 



< 



>- 



CO 



to 

 to 



O 



60 



80- 



5ioo- 



< 

 < 



o 



120 



140 







FREQUENCY: 50 Hz 

 ATTENUATION: .000548 dB/KYD 

 RECEIVER DEPTH: 175 ft 

 SOURCE DEPTH: 175 ft 



BOTTOM PARAMETRS 



J i 



40 



Figure 9. FFP MODEL RESULTS FOR TWO BOTTOM TYPES 



(LOW FREQUENCY) 



780 



