- ain. TE just as the party was setting out to start the engines for the X-Ray test it was noted that the "Dead Duck" was very low in the water. A salvage party was rushed to the scene but before the party arrived the ICVP sank at 0945 on X-Ray-minus-one, A party on shore was to start the generators in the OCE structure, They discovered that one of the generators could not be made to operate, therefore, the ratemeter was removed to prevent its possible destruction during the test. This proved fortunate since the structure was moved a considerable distance by the explosion. On PETER~X-Ray a token placement of different exposure materials _ 3 had been undertaken in order to test the efficiency of the methods employed, No particular problems developed as a result of this rehearsal and therefore on X-Ray-minus-four placement of materials was commenced, Previous to this the only film badges which had been instalied were those located in the Yards and Docks structures which had to be sealed well in advance of tes. time. On X Ray-~minus-four the badges were placed in the Corps of Engineers structures and on the two succeeding days behind the BuShips steel and concrete shields. oo : On X-Ray-minus-two the film badges and heat sensitivity materials were a placed on the islands adjacent to Engebi. oa panels and plaques to be used for studying thermal radiation were in-~ Ne. stalled and covered to prevent exposure to rain, wi . X-Ray-minus-one, four members of TU 7.6.6 went ashore on Engebi to ~~ place biological materials in cans, to remove covers from heat sensitive x plaques and to installfilm badges and heat sensitive papers on exposed On the morning of , ve wt. ° ~ ae . ” fee oe Mews “ eee 1 oY eo aa: sme te de a oee-trred pa e abi. ‘| e ae Cehe SEE eeLopNeSebDNASfoeet : ~ -7- = Ze During this period the