Figure N-lIf. Standard supporting arrangement. 



depth of operation. Perform the following steps 

 after the rack is shackled to the lowering wire : 



Stej) 1. Activate the camera system, and 

 check the light sources for the 15-second flashes 

 and the camera system for the sound of the film 

 advance motors. Disconnect the On-Off lead. 



Step 2. Activate the pinger and aiidibly de- 

 teiTnine that it is functioning. 



Step 3. Suspend the magnetic compass be- 

 low the mounting rack within the field of both 

 cameras (fig. N-11). 



Ste^D 4. Fill in appropriate items as shown 

 on the suggested format for a camera lower- 

 ing log sheet (fig. N-15). 



Figure N-15. Suggested format for camera lowering log sheet. 



N-8 



