Grove, which transported some shot devices between Enewetak and Bikini as the Special Devices Transport Element, 7.3.9.0, and escort destroyers, which served to screen this activity as Task Element 7.3.9.2. LST-762 and LST-551, both permanently assigned to the unit, also transported shot devices under escort from Enewetak to Bikini. Otherwise, these two LSTs, along with LST-1146 and the Terrell County (assigned to Task Element 7.3.7.3), carried passengers and freight between the two atolls. The USNS Fred C. Ainsworth, a ship of the Military Sea Transportation Service with a civilian crew, was the other permanent member of the unit. (MSTS) This ship provided housing and mess facilities for H&N personnel, TG 7.5, at Bikini. It also served as a radsafe center and decontamination facility, utilizing a barge moored alongside for these activities. Tables 82 through 85 describe activities of each TU 7.3.9 ship during the shots for CASTLE. Typically, the LSTs remained at Enewetak for Bikini shots, and at Bikini, the Ainsworth evacuated personnel from TG 7.5 and sortied for its Bikini operating area. The ship returned to the lagoon only after initial recovery operations had begun. The Ainsworth was slightly contaminated by BRAVO fallout on 1 March (Table 21). LST~762 was also contaminated by YANKEE fallout while under tow by LST-975 en route to Pearl Harbor. Two individuals in the unit recorded exposures slightly in excess of the MPE.- One of them was a crewman on board LST-762, the other a crewman on board LST-551. The LST-762 crewman was logged out from 25 February to at least 8 March on emergency leave to Treasure Island, California, and no reference is made to his returning. MPE waiver. Neither crewmember had received an No details have been found of any special mission assignment undertaken by either crewmember to account for the high readings. OTHER NAVAL UNITS IN THE PPG OR IN NEARBY WATERS DURING CASTLE Except for VR-7, no units in the following listing are represented in the personnel exposures of the Consolidated List. 373 These units were not