survey found radiation levels to be mich lower than anticipated. The
complete helicopter survey eemdsuahed confirmed the low contamination
levels encountered by the initial survey.
Several plausible reasons have
been advanced for the absence of heavy contamination,
The most reasonable
being that the water waves generated by the blast washed over the land
areas and washed the early fallout away.
6.
WILSON I cloud tracker was directed to make a standard E-type
search beginning at H+6 hours in a sector, true bearing 030° through 060°,
with apex on BIKINI. WILSON I was instructed toreturn via UTIRIK and
RONGERIK, WILSON I reported no intensity greater than 50 mr/hr. WILSON
II flez the pattern indicated in TAB , beginning at H+16 hours. WILSON”
II encountered intensities no greater than 10 mr/hr. Low intensities were
encountered throughout the flight indicating a general smearing of the
bomb debris by the light and variable winds at various levels.
DNA
7. ‘The off-atoll monitoring stations submitted radiation reports
or an hourly schedule beginning et O800M, 12 June, and contimed on this
schedule through 2000M, 12 June.
No significant increase in background
radiation readings were observed at any of the off-site locations through
H+3 days.