ANNEX I Notes on Operations Aerial Crater Survey-Radsafe Party No. 1 “< fe. . The C-47 with monitor took off from Eniwetok 30 minutes following the test. DELETED AEA Restricted Data Phase one consisted of flights over the crater at various altitudes in order to determine the radiation intensity above the crater. It was flown at heights up to 5,000 feet during this survey, readings were radioed in code to the USS MT MCKINLEY whenever the plane crossed an active area, Phase III included a check of the islands to the west of the test island at an altitude of 200 feet. DELETED AEA Restricted Data Phase II, a check of the air over the crater at 5,000 to 10,000 feet elevation, was then begun DELETED AEA Restricted Data A further survey was made on X-RAY-plus 1, followed by a recheck on X-RAY-plus 6, at which time the ground monitors were also surveying the crater. Final analysis of these data is awaiting study of the decay curves, but it appears that excellent results were obtained. 112 SECTION IX

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