At 0900 two helicopters departed from the Bairoko for the initial radsafe survey and two other helicopters were sent to Eneman Island with work parties to clear debris from the airstrip. At 1000, radiation of low in- tensity, except at the crater, was reported. The lagoon was reported clear by the USS Belle Grove, and at 1315 ships began to reenter the lagoon. Bikini was not heavily contaminated after ROMEO, since the winds carried most of the radioactivity to the northwest. Data from the free- floating buoys of Project 2.5 were not sufficient to produce reliable conFigure 74 presents estimates of the fallout pattern and intensity tours. derived from these data. km) from ground zero; H+l (Reference 40). The maximum intensity was observed at 35 nmi (65 this corresponded to a land reading of 435 R/hr at 1 Réne 10 R/hr, 50 R/hr ‘ 100 R/hr 200 R/hr. 400 R/hr, \ 200 R/hr. 10 R/hr 1 R/pr, ‘ ‘ ‘\ “\s SON . ~~. . ys OS “s . tt 8 See watas ASS wwe wee \ N ' ’ soy ' ' a ' t ! i 1 mofo A / ' gobo ‘ ' * \ ' “4! ‘4 f si S. \ MT “. ee os1 ‘ \ \t \ NO , ON ‘ 4 ‘a Nu . * “sz Ss ss “s Sea oN OS \s Sel T88 SSS oe x ‘ \ \ \ \\ 100 R/hr 1 Yu\ “NOON ‘ \ 400 R/e 50 R/he ‘ AN x* . * ros: ' oer, \ tote, 1 : iy 0 10 20 36 40 50 60 70 80 90 100 0 NAUTICAL MILES 20 40 60 80 100 120 140 160 185 Lo vvny eg V\ baad v\ Sane vette ve\va Aste Loe KILOMETERS Sse Wt! ‘ wR tt ; ty a, / 4 OF - 4 Sea” Figure 74. CASTLE, ROMEO close-in gamma fallout pattern at H+l (source: Reference 53). 262