412 



SUBMARINE TARGET STRENGTHS 



■ ■ I I I I ■ ■ I I t 50 MILLISEC INTERVALS 



ASPECT ANGLE 

 iN DEGREES 



270 



BEAM 



(h — -*H«-<| 



QUARTER 



0±15 



217 



note: first echo is a surface wake JBMBI- quarter 



Figure 25. Oscillograms of submarine echoes (S-class submarine). 



