. contact with leaders of the various scientific parties on the actual site of proposed operations, and familiarized themselves with the situation as presented in the field. They made inspections of all stations or installations involved in their respective missions, and conducted on-the-spot briefing of associated personnel concerned. daily check of all RadSafe radio circuits was also made. A Detailed operations schedules were compiled and monitors briefed on missions in the same manner anticipated for actual test operations. Particular attention was given to the ZERO island RadSafe survey scheduled to start on X-plus-l1 day. Since this operation involved the necessity of using a rather complicated layout of numbered stakes to be used as reference points for plotting isointensity lines, it was desirable to hold several rehearsals involving the entire survey party to insure the greatest accuracy and speed possible in accomplishing the operation, The need to expedite this mission was given special emphasis since it was considered "routine" and as such the allowable daily exposure was 100 mr. Throughout this period of practical indoctrination monitors were briefed in detail concerning the entire RadSafe operation, and all participating personnel had gained a comprehensive picture of respective assignments as they appeared under field conditions. The Task Group was now in readiness for the full-scale rehearsal of the Task Force X~Ray operations. This was reflected during PETERX-RAY operations when all TG-7.6 missions were rehearsed with a minimum of difficulty. 61 Section IX

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