WINCH 



OCEANOGRAPHIC 

 SHIP 



SUPPORTING 

 CABLE 



UNDERWATER CAMERA. 

 XENON LIGHT SOURCE 

 AND SONAR PINGER 



DIRECT 

 PING N 



BY COMPARING THE DIFFERENCE 

 IN TIME BETWEEN ONE PING 

 RECEIVED DIRECTLY, AND ONE 

 REFLECTED OFF THE BOTTOM 

 THE DISTANCE BETWEEN CAMERA 

 AND OCEAN FLOOR CAN BE 

 DETERMINED. 



REFLECTED 

 PING 



c 



c 



c 





Figure N-1. Dieep sea underwater camera syisteni. 



