SUBJECT: Raasological Survey of Downwind ‘tolis Contaminatcd by BRAVO 8 March = 1000 = 1800 Two partics in smll boats surveyed living arc: on Rongclap Island and castern half of Rongelap Atol 9 March - 0700 ~ 1130 Two partics in smll boats proeecded from the ! which was stationed outside Utirik Atoll and survcye Utirik and Aon Islands, tho main islands of the Atol 9 March — 1500 = 1700 Onc party in a small boat landed on tho outer reef of Bikar Island and survoyed the island, the on large island of Bikar \toll. 10 March = 0700 ~ 1100 Two partics in small boats proceeded from the | which was stationed outside Rongcrik Atoll and surve: Fniwctak Island (where the Task Force's Units had bo stationed) and the other important islands of the At 10 March = 1430 ~ 19@0 Two partics in smll boats proceeded fromthe | which was stationcd outsido Alinginac Atoll and surv the inhabited islands of tho atoll. 11 March - 0700 = 1400 Onc party in a small boat surveyed the northwe. ern islands of Rongclap Atoll and one party rochecke the Living arcas on Rongolap Island and established ; reference location for futurc decay measurcments, 12 March - 0800 Survey toam arrivod Eniwotok Atoll via DDE. 4, The following personnel from test projects in TG 7.1, TU 13, served a members of the survey tcam: Herbert Scoville, Jr, Richard Rast Richard Soulc Walmer Strope TU-13 Staff Project 2,1 Project 2,5a Project 6.4 Tho USS NICHOLAS (DDE 449) supplicd boat crows undor the direction of LT Cliff Frink, Exocutive Officer, for survoys. 5. Instrumentation Radiac sct AN/PDR~39 was sclcctcd as the instrumcnt to be used in the conduct of the survey. Five (5) cach of AN/PDR+39 were calibratcd with an 80 Curic Co™ sourco twenty-four hours before departurc. The calibration yiclded zcro-variation between instrummts - any scalc, Upon cross checking three of these instrumonts, (a point of actual survoy) in a radiation ficld of 0.320 r/ it was found that all three instruments gave the same roading. These survoy meters wore subject to profongeduve ‘undét}Cadvorse condi tions of dampness (to the point of sca watcr splashing ovcr thom), salt deposi and continual rough handling. With onc cxecption, all instrumcnts opcratcd cfficicntly for the duration of the operation. On the final day it was found iA //