48 hours, The flight tracks of these patrols were to be determined after the shot and based upon the results and circumstances of the first 2,— hour period and tho forccast and observed metcorclogtcal conditions, A further augmentation of tha over-all cloud tracking effort was planned to coma from periodic radiation reports from airersft on primary missions of weathor reconnaissance out to appracinstcly 1,000 miles from H to H plu: 48 hours, 7 be Although the prime cloud tracicing effort immediately post= shot was plannod as indicated in 3a above, certain other initial actions to assess development of the long~range fall-out potential of the shot wore also taken at this timmy It was plannod to intcreept the rcports of the clowd sampling tcam to dotermine heights, initial drift and ine tonsitics cf all segments of the cloud from about H to H plus 6 hours (Incl 6). FPuarther, 14t was plammod that all operational aircraft othcr than the cloud sampling team would roport any oncounter with radiation while engaged in their asaignod flight missions (Incl 5), Since the latter group of aircraft, as a rule, were attomptying to avoid contaminatior information from that source was basically "negative" and served primarily to define "clean" areas, The totality of all information gathered during the carly post-shcot phase, togother with the wind observations and fore. casts, was asmmed to be sufficiont to present a reascmably clear indica- tion of future dowelopments of the clow, and in sufficient time to verify decisions relative to safcty of personnel in the shot area. CG. Although no specific patrol was designed to search air and surface routos through the “Marshalls, the rvlatively favorable positions of these areas, couplod with wind forecasts and observations, advance action to close routes if necessary, "bonus" results from the efforts doscribed in 3a and b abowe, amd the presence of fixed land momitscr sta~ tions at several points in the area, wero considered sufficient to forme late decisions relative to the hasard potential for such routos. 6 Inclss i, Details for WB-29 Cloud Tracicing Flights 2. WB=29 Cloud Tracicing Flight #1 he WB=29 Radsafe Code 3. WB=29 Cloud Tracking Flight #2 §. Details for Radiation Reporting by all Aireraft (Except the Cloud Sampling Team) Operating Between Eniwetok and "-Bilcind Between H Hour and H plus 2b Care 6,. Sequonee Claud Report for Contrel 5=36 Sampling Opcorations with 1 Appormiix