LIST OF ILLUSTRATIONS Figure aber WW aba va. Frontispiece: CASTLE, BRAVO thermonuclear detonation, 1 Marc 1954. 1 The Central Pacific. 2 Enewetak Atoll, 1954. 3 Bikini Atoll, 1954. 4 Aerial view of Parry during CASTLE. 5 Typical metal buildings used at Enewetak during CASTIE. 6 Tents on Parry during CASTLE. 7 Assembly area on southern tip of Parry looking south 8 Enewetak airfield looking west. 9 Eneman camp, Bikini, looking south-southwest. 10 Enewetak detonation sites. ll Organization chart, Joint Task Force 7. 12 Organization and functions of the task force RadsafefOffice. 13 Radsafe organization for Task Group 7.1. 14 Task Group 7.2 radsafe organization. 15 Organization and responsibilities for Task Group 7.4 16 Pacific Proving Ground search areas and security zonds for Operation CASTLE. 17 Joint Task Force 7 weather element organization. 109 113 18 "Booties" worn for radiation protection during radiafion survey on Rongelap after BRAVO. 129 19 Three types of protective suits used during CASTLE. 130 20 Protective clothing being worn during CASTLE instrumgnt recovery on Adrikan Island. 130 21 Wilson 1 sector search mission for cloud tracking. 133 22 Wilson 2 sector and vector search for cloud tracking, 133 23 F-84G sampler aircraft. 135 24 F-84G sampling panel. 138 25 F-84G samplers parked at Enewetak airstrip. 139 17