« #3, ~ Ea 4 fi Instrument carriers, whose mission was to gather scientific data about many of the phenomena associated with nuclear detonations, lh. Photographic aircraft, whose mission was to furnish a platform from which still and motion picture photography of nuclear detonations and locations connected with nuclear testing could be taken, During Operation HARDTACK, test aircraft flew 307 sorties on test mis~ sions and a total of 3590 hours during the entire operation. 103 ara fuA