2.2.13 USS LST-825 Although not part of the task group, LST-825 was operating in the Pacific Proving Ground prior to Shot BRAVO. The ship departed Bikini on 27 February and arrived at Enewetak the following morning. It remained anchored in the lagoon until approximately 0830 hours on 2 March when it got underway enroute to Japan. It is assumed that the LST-825 received the same fallout as the residence islands of Enewetak following Shot BRAVO (see Section 2.2.1 and Figure 2-3). Table 2-13 is a tabulation of the daily integrated intensities topside on the LST-825 as inferred from the island data. Since this ship did not enter Bikini Lagoon, there is no contribution due to ship contamination. 2.2.14 USS LST-975 On 28 April, while steaming from Japan to Pear! Harbor, the LST-975 was requested to rendezvous with the LST-762 at 119 N, 175° 35' E, and to take it in tow to Pear! Harbor. The rendezvous was accomplished on 4 May (ze section 2.2.12). On 6 May, while the LST-975 was towing LST-762, both ships encountered fallout from Shot YANKEE. By 1330 hours, intensities averaged 20 mR/hr on the weather surfaces and, at 1505 hours, General Quarters was called. Quarters at 1556 hours (Reference 8), reduce the shipboard intensities. stopped, average The crew secured from General and fire hoses were used in an attempt to At approximately 1730 hours when the fallout intensities were as high as 96 mR/hr. By 0930 hours the next day, topside intensities had been reduced to 10 mR/hr; a subsequent survey on 8 May showed a further decrease to 7 mR/hr (Reference 10). Figure 2-24 depicts the reconstructed radiation environment onboard the LST-975; Table 2-14 details the daily topside integrated intensities through 31 May resulting from Shot YANKEEfallout. Ship contamination from Bikini Lagoon is not an issue. 92