CINCPAC FILE FFl-l Aho} Ser 001355 31 Oct 1953 h. It is understood that recent develo-sonts indicate that only a@ very smll portion of tha radicactive enorgy ganaratod by the LIKE detonation has been rocorded in the process of continucus fall-out monitoring extrapolated to tho present datu. As a result, two possible conclusions have teen formd. First, residual radicactivity is still scattured above the tropopauas. Second, major facleouts nave occurred on the open sea which have gone undetocted. To gain more knowledgs of the socond factor, the aC proposes to place gummed paper collectors on various naval controlled ships transiting the Pacific during Oper:- tion CaSTLS. In view of this devalo.mont, it is considered unwise to place too strong a roliinca on ths substantial radiological docunenta- tion obtained in reference (b). 8. , Repreduction and numbered distribution in local saries are iuthor= izod whan total additionsl distribution list is furnishsd the issuing office. s/H. G. Hopwood t,/H. G. HOPFOOD Chief of Staff c-/%