LASERS 3 
FIG. 5 RECORDER AND ELECTRONICS MOUNTING, BACK 
esos Pa spa ed Se  RecordarsMao wale et | 
| 
85-db Recording | 
ssh ie eat Amplifier Amplifier | 
' | aces AR23 Recording | 
1 1 Head | 
| 1 , 
| 
| Channel 1 | 
| | 
| 
| po enc | 
| | Recording 
| | filter Head 
Hydrophonel | f2=-6 ke 2 
2 | | 
7 | |ac2z3 | 
2 
| | 14-db 
Amplifier 
Water 
6-db 
filter Matching 
| : 
200 v7 Varicap £,=10 ke Pad 
Oscillator Amplifier Modulator 
a ele oaNy 
Pressure 
Transducer 
FIG. 6. DIAGRAM OF DEPTH-DATA CIRCUITRY 
13 
