4-^ SIHNIISS STUDS «ND WING HUIS- 



"0" RING GROOVI.PtllKER 2.4S4 



RING GROOVE 

 NtriONil°623020 



MIRROR PUIE WINDOW 



h!-lf 



Figure 15. — Engineering drawing for large camera housing (detail). 



to the trawl warp at intervals of 50 fathoms 

 to ease the strain from water resistance. 

 Cable to the camera housing is coupled through 

 a male Joy receptacle (No. 8118-10), and a 

 female Joy plug (No. 8118-4), (figs. 6 and 12). 

 These plugs are filled with silicone grease 

 before coupling. 



Lenses 



The dual lens mount of the N-9 camera 

 permits a wide choice of lenses. Four screws 



release the GSAP mount and expose the "C" 

 mounting. Wide-angle lenses of both 10- and 

 17-mm. focal length were used in this study 



TRAWL -CAMERA MOUNTING 



Methods of mounting cameras in fishing 

 trawls vary with the needs and preferences 

 of the individual investigator. The mounting 

 methods used in this study can be seen in 

 figures 2, 10, 12, 13, 14, 16, 17, 18, and 19. 



Figure 16. — Large camera housing, adjust- 

 able aluminum stand, wood mounting panel, 

 and pipe frame for trawl throat operation. 

 The 3-sided metal channel assembly (fig. 2) 

 replaces the bolted mounting panel seen 

 here. 



