HAMILTON: TIME VARIATIONS OF SOUND SPEED OVER LONG PATHS IN THE OCEAN 



VELOCITY 



o oo o 



CO vDO ■* 



CO cyioo 



10 15 20 25 30 35 40 

 RANGE IN NAUTICAL MILES 



45 50 





HI S 



TYPICAL SOFAR SIGNAL 



TIME 



4 LBS TNT FIRED AT AXIS TO SUSPENDED 

 PHONE AT 900 NM RANGE 



Figure 2. TYPICAL SOFAR SIGNAL OVER SARGASSO SEA 

 TRANSMISSION PATH 



10 



