TA, LACHCSSE Posject 2,64 — rALIOUT LOCATION AND DELINEATION BY AERIAL SURVEY ~ R, Greveson C3)20°VES To survey the gamza radiation from fallout cortaminated lagoon islends, lezoon water area and ocean ar2as using an aircraft borne detector. DI3CRIPTION AND EXPERIMENTAL PROCEDURE Cne P2V-5 aircraft was equipped with gamma radiation detectors to record the dose rate arriving through the thin aircraft skin from the surface below, The aircraft starting approximately H # 3 was to fly over all islangp in ¥ the Eniwetok Atoll at an altitude of 300 feet, then suivey the lagoon area to the west of IVOIRE, After survey of the atoll, the eticraft would continue ~vh end 2.i.cy uver the opin cocen to the nuscth end e.st, py crhaps toa “tsvance of 75 riles, During the flight, the activity coscrved by the stivrart “2s to be rotorded on a strip chart. This data would eventually be subject to '-olysis in en effort to establish ground surface radiation contours. During the survey of land surfaces, some special attention and possibly yycoted passes were contecrated for the J4CRCSSE crater, oe SULTS eyoa of interest for a period of 4 hours, q aad red the alreraft entry into the ¢. @D ia oO 3 se Ui y 0 oO ry tv 3) ™m Mo oO *cl my ch y wi Q w > 5 2 _. co 4 ft A A series of misunderstendires associated with the mechanics of filing Further confusion resulted in pro- hibiting the aircraft fran flight lower than 1,000 feet and ordering it away fveoa the atoll land areas, Pain squalls corer the legoon area presented an iv-jrediate possibility of aircraft contamination, vithdrawing the mission without any data, , - 32 - All circumstances cozbined to 22 Sn 4 Z| GF: