way splice at A and a two-way splice at B as 

 shown in figure N-8, and connect components. 



Step 2. Connect ground terminals on all end 

 caps by a common ground wire. 



btep .'5. Connect external wires for Sonar 

 pinger (see ch. R). 



TWO CAMERAS AND 

 UTOMATIC TRI6GERIN 

 .L UNITS SHOULD HA 



LIGHT SOURCES 

 IITHOUT SHUTTER. 

 ^ COMMON GROUND) 



Figure N-12. External wiring diagrams for Model 200 

 camera and Model 210 light source. 



N-13 Other Camera Systems. — In addition 

 to the system described above, other camera sys- 

 tems are employed. Two are described below : 



1. EG&G Model 200 Camera with EG&G 

 Model 210 Light Source. — This system is al- 

 most identical to the one incor2>orating the 

 model 204 camera. It consists of two camei-as, 

 two light sources, and a Sonar j^inger; and is 

 powered by one 6-volt battei-y that is contained 

 in one of the light source housings. Since no bat- 

 tery packs are necessary, one camera, one light 

 source, and the Sonar pinger from the system 

 can be mounted on a pinger rack for single- 

 plane photography. Because tlie jiinger rack set 

 up is compact and light weight, no boom or 

 crane is needed to hoist it overboard. External 

 electrical connections are shown in figure N-12. 

 Mounting arrangement on the pinger rack is 

 sliown in figure N-13. Otherwise, tlie preinnner- 

 sion instructions in paragraphs N-9, N-10. and 

 X-11 also pertain to this system. 



2. EG&G Model 205 Camera with EG&G 

 Model 206 Light Source. — This system consists 

 f)f one camera and one light source, each of 

 which are about half the size of their counter- 

 parts in the other systems. The light source is 



powered by a 510-volt dry cell battery, and the 

 camera is powered by a 30-volt dry cell bat- 

 tery. This camera will take 20 to 25 exposures 

 at 6-second intervals during one lowering. It 

 usually is mounted on a pinger rack, and it is 

 activated by sliding a messenger down the low- 

 ering wire to trip a mercury switch or by bot- 

 tom contact. Refer to the instruction manual 

 for operation and maintenance. 



TOP VIEW 



RACK 

 PINGER 



rznEix 



SIDE VIEW 



C CAMERA 



L LIGHT SOURCE 



D PINGER DRIVE 



T PINGER TRANSDUCER 



X PINGER TRANSFORMER 



Figure N-13. Pinger rack mounting arrangement for 

 .single-plane photography. 



N-14 Immersion of the Underwater Camera 

 System. — Figure N-14 presents a standard sup- 

 porting arrangement. Tlie winch and wire used 

 should liave a capacity of several times the 

 weight of the camera. U.S. Naval Oceano- 

 graphic Office personnel lower the camera sys- 

 tem with oceanographic winches, using %6"inch 

 or larger oceanographic wire, depending on 



N-7 



