FIGURE 6.--DIAGRAMMAT IC SKETCH OF POSITIONING OF THE TELEVISION CAMERA 

 TO VIEW OUTSIDE OF COD END. 





FIGURE 7. --DIAGRAMMATIC SKETCH OF POSITIONING OF THE TELEVISION CAMERA 

 TO VIEW FORWARD PARTS OF THE TRAWL. 



on the television monitor too late to maJce 

 towing-cable adjustments, and the camera 

 fouled with the net. This approach was 

 suspended in favor of attaching the camera 

 directly to the net. In very clear water 

 and under well-controlled conditions this 

 method could be used successfully. 



The versatility of our television 

 system has permitted its use in studies 

 other than those connected with fishing 

 gear. The ceunera has been used to observe 

 bottom fauna by attaching it to a mounting 

 stand. We have also used the mounting- 

 stand arrjingement to study the behavior of 

 fish by fitting it out as a cage (fig. 8). 

 This particular study was conducted to 

 determine the condition of fish after tag- 

 ging and their subsequent return to the 

 bottom. 



Cable Handling Problems 



Very few problems involving function 

 of the camera unit were encountered in the 

 otter-trawl work. Most of the problems 

 were associated with the handling of the 

 cables. We have listed the conditions that 

 create hjuidling problems and the precaution- 

 ary measures we have used. The problems 

 fall into four major categories: 



1. Cuts and abrasion of the neoprene 

 covering . 



These occur more frequently than one 

 might think and in ways that often cannot 

 be accounted for. If the covering is cut, 

 water will get into the electric cables and 

 short them, resulting in equipment failure. 

 The smaller cuts can often be successfully 



