REPORTS OF RAIN DUQING BRAVO FALLOUT Transcripts of post-detonation briefings suggest ovgurred for a short time after Bravo was detanated. that seil-induced rxinout The crew of the Japanese fishing ship, No. 5 Fukura Maru (Lucky Dragon), while fishing downwind just outsice the exclusion zone, noted that the initial fallout on their ship was agccompanied by "a light rain or drizzte.t It is unlikely that this was a continuation of the self-induced rainout, some two or more hours after Bravo's cetonation; it was orodabdly a natural rain system superimposed on the debris cloud. Another report of rain during Bravo fallout was made by a sroup of Rongelap natives after evacuation! 3! They lived in Rongelap Village, on the southern part of Rongelap Atoll, and stated that it "rained a little” during the afternoon of March Ist. Another interview with an American Air Force radio operator (3] who had seen on Rongerik Atoll prior to evacuation disclosed that "rain commenced about 2100 [LST] and continued for 30 minutes." Finally, the S. S. Roque, owned by Micronesian Lines, left Kwajalein at 0845 LST and arrived at Utirik at about noon on March 2, 1954. The ship left Utirik (apparently a few days later) and arrive at Majuro Atoll on Maren 7. A radiological survey at Majuro disclosed radiation readings of 10 to 30 mr/n on March 7. The ship's captain mentioned that he had encountered rain squalls during his voyage, but was not specific about where or when. It appears certain that the S. 8S. Roque encountered Bravo fallout, possioly accompanied by rain showers, either while approaching or while in haroor at Utirik. If 10 mr/h are "grown back" to five or six days earlier (when the Bravo debris cloud passed near Utirik), the dose rate is estimated at about 100 mr/h.