alPT SUBJEC dort on Soil and “htor Sampling Misston collected at approximtely 1200 M, 6 March 1954. Instrument readings with the ux-* showed a maximin of 3 ar/hr, however this ma not considered relinbla, since 4 higher scale showed o lower reading. Ge A » Tho ship roachod this atoll at approximtcly moved to an anchorage off Ailuk Island, tho mest fareh 1954, and s populated. Tha lagomn bss net been swopt, and numcreus cornl hoads and provided considerablo hazard to ship movoment. The landing party moved 1400 MU, 6 heavily pinnscks ashero by whalobent without difficulty, -nd ag-in obtained mter samples from the aost promir. ant edstorn and seil samplos frea random wisholtcred spots. Rcadings with the WX; showed appreximtoaly 3 ar/hr (off the 2 ar scale). iin AN/PDR@27E showed a high roading of 7 ar/hr, however, on a diffcront sealo a reading of 12 or 15 ar/hr vas The MX-5 roading is probably noarest correct. obtained, wero dotcetcd on bare fect or clothing of individunls. takon at approximtely 1700 M, 6 March 1954, a, « No significant variatia - Samples and readings wor: This singlo coral island is also qurrownded bya recf, 73 ts JEM, but wis possidlo with a whaleboat, dic to an arca protsctod fr_ tha surf, The island was found to bo hoavily populated in viow of its siz, the votal number of people boing 327, according to tha island anagistrata. Soil and wator samplos wore takon as in tho previously dcoscribod manncr, at approximtoly 1300 M, 7 March 1954. Roadings with tho MZ-5 showod maxtamm of approximtsly 3 or/hr tore the 2 scale, but appreximately 1.5 on tho 2 sealo); the mucime read. with « POR 27 Ewas 10 or/hr. Tho truo figuro was probably somowhore botwoen the LNOe 2. ficld instrumnts of « Low levol (less than 10 ar/nr) radiation acasurcact s with the typo usod aro highly unsatisfactory, Ono M%-5 and *-- AN/PDR 27 B instrummts all showod widoly variant readings on different scalcand varied among cach other whan cxposed to tho same radiation. An jN/PDR 11-8 proved complotoly useloss not holding to sore oven aftor an hours warmeup, and also showing widoly variant roadings on diffcront scalos, 3. REDATIS landing partics in islands such as JEMO and MEJIT shoul be provided with a 6—man oF S-nnn prcumtic boat, to provide greator safcty to porsonnel and oquipmort. This will pormit landing directly on live coral reefs with loss dangor of the boat baing stove in. Ships assigned to such aissions should draw euch oquipmcnt prior to dcparturc. ke Tho suscossfal accomplishaont of tho alssion ms greatly facilitated by tho interest and cnthusiaem of tho Commanding Officor of the USS RENSH.4, CIR L, 5. lford, USN, and his officers and mon, Thoir matorial contributions were noccssary to the aissicn, however, tho many valuablo suggestions and assistance in slitions of problems proved invaluable. BR. D. Croa R. D. CREA Mas, USA _™ /s/