YW Be Flight #3 (H/24 to 1/36 Hours): This flight will attempt to determine the extent of drift of other mjor soguonts of tho atomic cloud as practicablo ‘and as required by existing motoorological influonces, Areas and altitude of sc-rch are to be specifiod lator and will be contingent upon the above influvonces and tho results of flight #1 ond #2, Specific instructions'forithis mission ‘will be forvdarded by CUTF. SEVEN to’ CIG 7.4, LATIN: Commander, Test Services Unit, not lator thon cight (8) hours prior to schedulod aircraft take~ off, Flight #4 (H436 to HY48 Hours): Tho necessity for schcduling this flight will bo determined by CJIF SEVEN on the besis of the result of Flights #1, #2, #3,and other sources, Ze ifission instructions from CJTF SEVEN will be rout~ ed through normal command and cormunications channels, However, to insuro that advance details got to TG 7.4 sufficiently in advance of the mis- sions, infornal mission instructions will be tran~ amitted through USS ESTES Woathor Central ENIWETOK Weather Stetion RATT channels by mission take-off timo minus oight (&) hours for each flight. Tho basic requirement for cloud tracicing flights is to provide data of sufficient accuracy to support conclusions and decisions relating to health hazards, and to confirm or modify forecast cloud segment drift. In genoral, the missions are to be flown on tho tracks specified with max~ imum emphesis on complote coverage of the design‘ated arcas.. It is not anticipated that in flight analysis of the overall situation will be necessary, except that trackingaircraft crows should recognize cloud boundaries and leading edgos. Deviations from tho prescribed track and reporting positions should be mde only in the event of entry into highly contaminated arcas. For cloud tracking mission, turn-out will bo exccuted when intonsitics of 3,0 r/hr ore approached. Following such turn-out, appropriate in-flight adjustmont of track should be made by the aircraft commander in the interest of mescimum coverage of the desig- nated erca. The rad/safe monitor will excrcise discretion on turn-out from contaminated areas, eerefully considering crew personnol dosages and the anticipated longth of flight through thc radiation field. Since precise measurements are not required, suitable RADIAC equipment and reporting codes have accordingly boon specified bolow, ze Each flight will havo on board sufficiont instruments of tho following types to insure reasonable ctation of proper functioning of at least one G)of each types ge AN/PDR-TIB, be Mx-5 or any equivalent military instrument “such as the AN/PDR-27, capable of dircct reading in milliroentgens por hour. ASK GROUP 7.4 OPRS ORDER NO. 1-54 ANNEX "Mt" Mp4 ,

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