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NAVY PHOTOGRAPHIC BRIEFING. At their 

 San Diego training station Navy carrier-based 

 pilots from the "Saidor" are briefed prior to making 

 practise flights. Later, pilots like these made 

 photomosaics of the Bikini Atoll and flew many 

 photographic missions before and after each test, 

 recording locations and conditions of target ships. 

 In some of this work tri-metrogon cameras were 

 used. These cameras are virtually three cameras 



in one, with one lens pointed vertically downwards 

 and the other two lenses pointed to right and left 

 to cover all the remaining field from horizon to 

 horizon. For this photographic work the Navy used 

 six Navy F6F-5P's, four TBM's, three PBM's and 

 four F6F drones. Cameras in planes were in some 

 instances accurately synchronized with cameras on 

 towers and on surface ships in order to show the 

 test from various angles at the same instant. 



