Oo - 2 | (4) Bikini Atoll consists of some 15 islands and 2 island complexes made up of a number of small interconnected islands (Pig. 1). je The islands are located on 4 coral rim surrounding a lagoon 22 miles long and 13 miles wide. of the atoll is 2.32 square miles. Total land area Over haif the area is included in the 3 largest islands, Bikini, Eneu, and Nam. The largest island, Bikini, is 24 miles long and + mile wide. = ras b * The techniques utilized on this survey were largely wt a ~~ those developed and used by tne Sealtn and Safety Laboratory (HASL) for the past several years in conducting detailed ren investigations of the properties of the external radiation environment in the United States (1). The prime instrumenta- at field spectrometer system for in situ y-ray spectrometry, and a number of hand-held survey type instruments _. (G-M counters and scintillation detectors).. A total of 16 working days were spent on the atoll, but s because of the number of islands to be surveyed and the ee Ad difficult logistical problems and environmental conditions “" % ° ee , mw ot . Adifficult access,:dense vegetation, high temperatures, _ ~ » -” - e SO mw at ede a 1 ~ 8 i Be o-salister Te Ee eg ee te PR eh SERa be me + te ee Bom cae * Fe oma vB rk yh oH lg : : lt (wage at ek em weart wee . : : - , eg ee ~ te 4 i : . Pe re meme i i i“ BO bee PER ee 4 gibi : wee ee = - Pinte ~ 2 cn ae ie . a te a eo 1 RE RT SeIE capil 8 Notes Kier et MT Aap Bate bake . cs oS — . . T - fee ew seme ea y at” nial tees ave no —— a” : . - . % soe nal a, era NG pe. pe ~~ aetna ~ “’ eg ERoe ee as rem came ae = - ate, an w San = . te ee ~ . . ea -_ ow - Ce eee ~ eon es ~ ee li ~ . m, = 4 h tion used for the survey measurements included a hich-pressure ionization chamber, a NaI(Tl) , 7 oaLove ”