699 



At 52 ft. 



At 55 ft 



'iv.- 



Charge depth 8 ft. 



Chargg depth 8 ft. 



20 



40 



60 

 TIME 



80 



lOO 



Charge on bottom 

 depth about 18 ft. 

 f^rames 



120, 



(Arbitrary Tero, 



Fig 3 



WAVE AMPLITUDE AS FUNCTION OF TIME AT HORIZONTAL 

 DISTANCES OF 52 ft AND 55 ft FROM THE CHARGE 

 FRAME SPEED 14 5 /sec 



