KUTSCHALE: LOW-FREQUENCY PROPAGATION IN THE ICE-CO\^RED ARCTIC OCEAN 



TIME (SEC) 

 5 



J \ L 



J_J I 



SHOT 

 DEPTH 

 66 M 



■"/'* 





'f."Mr^-^ HYDROPHONE 



WECOWDE» '^/•i^ '» 



VwVvN,»/i 





+ 413.0 SEC 



■•S\?'iS''' 



fmm^h '' iV*«%? GEOPHONE 



„; : , M 1\ I ^., t ,111 



V ' v\Wl 



^l^^^ffW^^ii^^lwflV 



i 



^•H^^My^^i^K^H'Tif. , -fi^'^*"*"^ GEOPHONE 



183 M 



I'^AVti.V . 



WfyVV^' 



l' .■», 





HYDROPHONE 



^^^^^i^fi^ifmr^r^'^^^^ HYDROPHONE 



'.^♦^(iy**«.l^>>«. GEOPHONE 



+ 417.0 SEC 



OUTGOING SIGNAL 

 FROM SONAR BOOMER 



Figure 8. SEQUENCE OF OSCILLOGRAMS OF 5 lb. TNT CHARGES 

 FIRED AT DEPTHS OF 66, 183 AND 36 6 m. HYDRO- 

 PHONE DEPTH 46 m. SIGNALS TRAVELED ABOUT 600 km 

 APPROXIMATELY ALONG PATH 3 OF FIGURE 4 



697 



