BRAVO to ubtuimthe initial increasing exposure rate history evinced on figures 24 and 26. This method yielded a fallout deposition period of 5.5 hours on Rongelap anu 12 hours on Utirik. This time compares well with the original ob- servations 1.:ported by the Marshallese and by U.S. Navy personnel stationed in the areu (St 57). greater detutl Figur: ries. Initial dose equivalents on "acute doses" are developed in in another report. 25 demonstrates the external exposure following the 1958 testing se Since return to Rongelap followed 3 years after the BRAVO contamination, this series contributed in large part to the external exposure post return. 24