—_—_— radiation. 74 “ne appromately thirty hour flight. Post shot me: ng was accomplished by various activities within the Task Group to insure the earliest possible detection of radioactive fall-out or damage produced by the detonations, Rad-safe teams con- ducted island monitoring on Eniwetok immediately following each event and continued their checks for forty-eight hours or until the danger of fallout had passed. Task Group 7.4 provided personnel to man four (4) off-atoll weather rad-safe sites. These sites at Kuasie, Kapingamarangi, Nauru and Tarawa maintained a continuous fall-out surveillance program to insure earliest possible detection of this hazard, The personnel assigned to these sites were trained in the United States and were selected carefully to insure a favorable relationship with the native population. Their equipment in- = cluded a continuously recording geiger instrument and they submitted periodic radio reports concerning their observations, of adverse fall-out encountered during the test series, There were no cases Monthly inspection visits were made to these rad-safe activities to assist with instrument maintenance and calibration and to evaluate the collected data, All milti-place aircraft flying in the Eniwetok area during or within twenty-four hours following an event were provided with a Rad-Safe Monitor whose duty was to keep the aircraft commander advised concerning radiation encountered onthe flight. Those aircraft positioned in the test array were required to radio their safe condition immediately following shock wave passage. Approximately one (1) hour after each detonation a helicopter was © or near ground zero to F vopiep/poe : LANL RC “L