UNCLASSS78 ma * -_ ANNEX I Notes on Operations Aerial Crater Survey-RadSafe Tarty No, 1 The C-4,7 with monitor took off fram Eniwetok 30 minutes following the tost, Northeast of the sero island and upwind, it encountered a small amount of fallout almost at once, bub proceeded on its mission at 5,000 ft. with a backround of 4 ne/lir. Pluse 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 ft. During this survey, readings were radioed in code to the USS LT 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 fect. Readinys of 500 mr/hr were obtained over the three islands immediately to the west, indicating extensive fall-out on these islands. Phase II, a check of the air over the crater at 5,000 to 10,000 feet elevation, was then begun but the intensity at 8,000 feet indicated neglizible radiation, 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, Evidence of fall-out on the islands adjacent to the test island was later confirmed by the growd survoy. Eniwetok Island - RadSafe Party No. 2 The radsafe party in Eniwetok Island consisted of Captain Mallory and two assistants. The first members of this party arrived on Eniwetok Island, 30 March. <A radiolosical safety center was established in the radiochemistry laboratory. This location was in clese praxinity to the drone parking area and vroved to be ideat for the mission at hand, A TCS radio was installed by the Island Commander's communications office und continual watch was kept on this curcuit with the RadSafe Center on the ET ECKINLEY and Radops on the BAIROKO, Canplete rehearsals were held on PETER X-RAY Day with thedrone landings and it wag estinted that two monitors could handle the filter removal operation. At O725 following the shot the first drone plane linded. The drone planes were not parked together. This caused some confusion and it was very difficult. for the monitors to keep in contact with all the personnel invoived. However, by 1000 the top filters were unloaded and on their way to the states, Nona of the personnel involved received the tolerance Linit of 3 r on this mission, After all of the filters were ronoval it was apparent that the air persomel could remove their data fron the drones, as well as the film badges without exceeding the O,1l r for a routine mission. ~ le =e