12 KC SOUND PULSE SOURCE 



VELOCITY- DEPTH 

 ^ PROFILE 



''VELOCI-k 

 METER /- 



HOMOGENEOUS 

 ,F-- -"PATCH" OF WATER 

 ';— I— a-" 



-'HYDROPHONE 



FIG 1 SOUND VELOCITY MEASUREMENT WITH A SUSPENDED METER 



CHANGE IN DEPTH " A Sin fl COS ^ 



I CONSTANT 



LaPPROXIMATELY -ill 



FIG 2 DYNAMICS OF DEPTH CHARGES IN A WEIGHT ON A LONG CABLE 



^ 



1 



MASS OF WATER - 2W 



-0- 



FIG 3 DAMPING EFFECT OF 

 WATER MASS 



FIG 4 PARALLEL TUBE TOWING 

 DEVICE 



2600' 



CARRIAGE 

 OPERATOR 



EAST END 



LOCATION OF 



CRANES 



40' 



ALARM BARRIER 



-SUSPENSION POINT 

 FOR TOWING DEVICE 



SIDE VIEWING PLATFORM 



WAVE 

 MAKER ' 



SECTION AA 



VIEWING 

 PLATFORM 



:^_ 



cm 



FIG 5 TEST IN MODEL BASIN 



60 



