a Y-minus-, through Y=plus-1 was published and distributed to all concerned. Monitors were thoroughly briefed in their particular missions. On the afternoon of Y-minus-1, YOKE day was postponed one day. For the most part this merely involved setting back the schedule accordingly. However, it did necessitate return of certain personnel of the technical measurements unit to the LOM "Lame Duck", anchored downwind from ZERO point, to refuel generators and reset clocks on the cascade impactors. The Technical Measurements Unit also checked materials at other installations, replacing those which had become damaged by showers or long exposure to the sun, On the morning of YOKE day the BAIROKO was anchored about 1, miles from ZERO island, and at about H-plus-30 minutes got underway. The lagoon reentry patrol boats for this operation were put in the water before the CVE got underway, preceding reentry into the ZERO area and checking intensities over the entire distance from the pre=shot anchorage to the new berth in the vicinity of ZERO island. The number of ‘these reentry patrol boats was increased for YOKE day; four from the BAIROKO and two from the MT, MC KINIEY. | Meanwhile various other scheduled RadSafe missions followed the same pattern of operations which this report has outlined for Test X-RAY, All of these missions were accomplished successfully, and in most cases were completed ahead of schedule. An additional mission on YOKE day was accomplished by a party of medical officers who explored islands in the immediate vicinity of the 71 Section IX

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