route points 10-22%, 166-568 and LO-32N, 1456-048, SOA 12 mote, estinating BIKINI a® 2705CQE with tha entire weather detachmens and project 6,6 perscae nel aybourtsr- > 4-—~ rn - | “Based om the preliminary helicopter damage and radsafe survey male abgué H plus 6 bours, an alert advisory was issued to all tase force units. This acvisory indleated that OBOS and the air strip were not appreciably contami= nated but that the strip was debris ridden to the extent that Might operations would be NaN read iffpractical for at lease UNION day, Further, it was indicated that or/hr at 25 feet amithat the water in the vicinity of the Nii anchorages was not believed contaminated to a significant degree. R-Hour was expected to be 26143CM. CTG 7.3 was iirccted to have the task force ves= sels stand off the lagoon entrance at 100M pending the outcome to the lagoon water sampling of the NM anchoragess Upon confirmation of R-Hour all units were directed to commence re-entry in accordance with previous instructions. By 100M, the lagoon water from the NAN anchorages having beer exemined and fowyi relatively free of contamination, a firm i-Hour aivisory was passed to all units, This advisory state? that cloud! tracking amt other operational flights since H-Hour indicated no radiation hasard to surface operaticns or to flight operations at any altitude south of BIKINE ani that the water at the NAN anchorages was below safe radiation limits. [-Hour was announced for WICH, «4 directive was included that, effective at R-Hour, recovery operation were to be controlled by the aadsafe CENTER of TG 7.le .Lso, all water ant sir traffic in the vicinity of the NAN anchorages and to the air strip was declared radsafe wnrestricted frovided no landings were made on islanis west of SUG:R. All other water amd air traffic was mie subject to clearance by the Radsafe C_NTER. Swimming in the lagoon was prohibited until further no= tice, it ReHour, all units were “lrected to commence re-entry to the NaN anchorages in accordance with previous plans, Frior to re-entry, CIO 7.3 Adrected all ships 1t BIKINI, wmtil notified otherwise, to be ready to get underway on 30 minute notice after nachoring. Use of evaporators was authorie zed. The ships were 2zlso ‘irocted to keep wash Jown systems ready for immee diate use except when this would interfere with essential ship actions. Wilson 4 was directei at H clus & hours to perform his search centered on RONGERIK with Limiting true bearings of 65° at 10,000 feet from H plus 12 to H -lus 24 hourg, thence to 15N, 163E to base. Since the Wilson 3 search rattern iid not ultimately incluie 'OTHO Atoll, Wilson 4 was later Jirected to pick up the minimum altitude survey >of this location in addition to his | regular mission, No significant contamination was observed on the 240CM, 200 foct survey of ‘JOTHO on shot day, Cloud tracking efforts subsequent to re-entry were mostly routine and apparently in good agreement with the forecast. Details are included in the inclosure attached hereto. By the evening of shot day, it was apparent that no further clout tracker flights would be required following Wilson 4. CTG 7.4 was notified accordingly. NYKOPO Flight able was schetuled for 27 april and requested to report accumulated data in flight when over TAONGI Atoll. it 1900M on shot day a report was received from the radsafea monitoring & No5