| The Wilson 3 aircraft, flying at 5,000 feet (1.5 km), contactéd the cloud while in the racetrack holding pattern at H+5.25. The intedsity was 2.015 R/hr in a later sector search at an altitude of 8,900 feet 92.7 km); intensities of 0.050 R/hr were encountered at H+7 about 100 nmi (385 km) te rei ir aortheast of Bikini. > ra] = No aircraft flying between Bikini and Enewetak encountered airborne radiation. Subsequent Wilson flights were cancelled. Based on a helicopter preliminary damage and radsafe survey at] approximately H+2, all units of the task force were issued an advisory drective as follows @® (Reference 16, Tab M): Lele through Aerokoj and Eneu not appreciably contaminated Reentry hour expected to be 1100 on 7 April CTG 7.3 have task force vessels stand off the lagoon entrance at 1000 pending the outcome of the lagoon water survey of the Eneman and Eneu anchorages @ Upon confirmation of reentry hour, all units reenter Eneu anchorages in accordance with previous instructions. ° The results of the preliminary survey indicated that Bokbata, ’ Enidrik, and Bikini islands and the Iroij-Aomen chain were contaminated. Lagoon contamination was restricted to a V-shaped pattern with the Eneman and tips covering the Bokbata-Aomen area. was obtained over the Eneman anchorage at H+4. Bpex at A reading of 0.10D Eneu anchorage was R/hr Flear of contamination, whereas Bikini anchorage showed traces of contamihation at H+4. Reentry and recovery occurred largely on shot day. Table §9 Shows the radiation levels on various islands of the atoll. A gamma~rate record was obtained at [Iroij. The fallout arrivedjfat about H+20 minutes, and a maximum exposure rate of 23 R/hr was obsegved at H+40 minutes. p. The integrated exposure was 51 R until H+15 48). 279 (Referende 40,