~ RES omic Pre and post shot crater survey photography was made ATO clear detonations during the test. Aerial photography of many of the detonations was included in the program and much miscellaneous aerial photo- xraphy was done, such as photography of B-57's and the B-52 in flight and silhouetted ugainst a nuclear detonation, shots of Waval vessels and Navy get fighters in flight. The largest shot participation for this element was on the underwater shots ‘JAHOO and UNBRELLA, On these shots all five (5) of the Aerial Phcto slement aircraft participated, With the commletion of the UMBRELLA shot, the participation of the RB-50's was completed and on 11 June they departed . the EPG. On 22 June, one (1) C-5) was returned to Clark AFB, After the ELDER shot another C-S) was returned to Palm Beach AFB on 30 June. One ch Ce54 was retained for use in aerial photography and airlift until after the last shet. Figure 12 gives a summary of flying activities of the C-5h air- craft cf this element and Figure 13 gives a similar summary of the flying’ | activities of its R2B-50's, . | vais chapter has described the missions and the participation of test anriral. in Operation HARDTACK. series yet neid. This operation was the largest nuclear test During the Operational phase, 33 nuclear detonations were heli in «he Enivetok Proving Ground and tvo (2) at Johnston Island, Test aircraft, under the cperational contrel of Task Group 7.4, participated in every t2s* shot in the operation in suopert of many scientific projects. Tne aircraft had many various missions but could be categorizec into four (4) different sypes of missions: 1. Samplers, whose missions was to collect particulate and gaseous samples fron the nuclear cloud, 2. Sifects aircraft, whose mission was to aid in the stucy of the effects of nuclear explosions on pee structures, Seu COPIED ED/> +:- LANL pa “* .See IC‘ NOT R POR SAGN ABLE To RATIONALS