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PHOTOGRAPHIC MOSAIC. Navy pilots piece 

 together overlapping photographs, taken from 

 high altitude, to form a single mosaic of an area, 

 in preparation for similar projects at Bikini. Photo- 

 graphic mosaics were used to give accurate rendi- 

 tion of details of target ships and islands during 

 the tests. Developed during the 1930's, photo- 

 graphic mosaic work is now a well established art. 

 Definition is so good with the cameras used that 

 the enlargement of a photograph of a German 

 motor convoy, taken from an altitude of 20,000 

 feet, can be used to determine the license numbers 

 of individual vehicles. 



