2.2.2 Kwajalein Atoll On Kwajalein Atoll, measurable fallout occurred after Shots BRAVO, ROMEO, and YANKEE, while Shots KOON, UNION, and NECTAR produced no fallout. As on Enewetak, all fallout was secondary in nature and low in intensity. The Naval Station at Kwajalein provided basing support to Patrol Squadron TWENTY-NINE (VP-29) during Operation CASTLE (Reference 15). This squadron supported the AEC's worldwide fallout monitoring program with aerial radiation survey flights following each of the CASTLE events. The results of these survey flights, which included Kwajalein, were converted to ground intensities using experimentallydetermined air-ground correction factors (Reference 10). ground survey data for Kwajalein were recorded. In some instances, actual These comprise the primary source of intensity data used for dose reconstructions. In addition, a few intensity readings taken at the Naval Station were also recorded in Reference 10. The intensity data are summarized below. Date (Time) 2 Mar (1800) 4 Mar (1200) 19 Mar (1200) 30 Mar (1545) 31 Mar (1545) 3 Apr (1354) 8 Apr (1453) 12 Apr (1200) Intensity (mR/hr) 0.6 0.5 0.1 0.05 1.0-3.0 actual ground survey reading actual ground survey reading based on aerial survey reading actual ground survey reading on beaches (ground) 0.53 based on aerial! survey reading 1.4 -0.4 1 May(1200) 0.1 6 May (1645) 7 May (1800) 1.0 4.5 6 May (1455) 8 May (1335) 15 May (1335) 16 May (1236) based on aerial survey reading 1.5 12 Apr (1452) 21 Apr (1435) Notes annoted in Ref. 2 as probably erroneously high (ground) based on aerial survey reading 0 probably not actually zero (aerial) actual ground survey reading 0.4 :based on aerial survey reading maximum ground survey intensity highly questionable ground intensity reading based onaerial! survey reading based on aerial survey reading 0.2 0.1 0.08 based on aerial survey reading The onset of fallout following Shot BRAVO did not occur until approximately 0800 hours on 2 March. By 1800 hours, ground surveys on Kwajalein recorded average 40