REPORTS OF RAIN DURING BRAVO FALLOUT Transcripts of post-detonation briefings suggest that seli-induced rainout oceurred for a short time after Bravo was detonated. 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 accompanied by "a light rain or drizzle.) It is unlikely that this was a continuation of the self-induced rainout, some two or more hours after Bravo's cetonation; it was probably a natural rain system superimposed on the debris cloud. Another report of rain during Bravo fallout was made by a group of Rongelap natives after evacuation! 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’?! who had 2een 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 0345 LST and arrived at Utirik at about noon on Mareh 2, 1954. The ship left Utirik (apparently a few days later) and arrive at Majuro Atoll on March 7. A radiological survey at Majuro disclosed radiation readings of 10 to 30 mr/h 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. S. Roque encountered Bravo fallout, possioly accompanied by rain showers, either while 2pproaching or while in harbor at Utirik. If 10 mr/h are "grown back” to five or six cavs earlier (when the Bravo debris cloud passed near Utirik), the dose rate is estimated at about 100 mr/h.