Naval Radiological Defense Laboratory, San Francisco, California. This naval laboratory was the largest naval group in TG 7.1, with 76 civilians and 8 military involved in nuclear radiation projects 2.5a, 2.6a, 2.7, and 6.4). (Projects These experiments had an inherently greater potential for exposure to nuclear radiation both in data~recovery operations and the associated laboratory operations than others, as illustrated by the higher than average exposures for these personnel (Table 59). Naval Research Laboratory, Washington, D.C. NRL was the third major naval laboratory organization participating in CASTLE. Thirty-three civil- ians and six military manned two projects in TU 13, Projects 1.4 and 2.3, and four interrelated experiments for LASL in TU l. Naval Receiving Station, Treasure Island, California. This organization furnished three enlisted personnel to NRDL for Project 2.5a. These, judging from their ratings, were seamen and were likely used in buoyrecovery operations. missible Exposure One received 11 R, well over the Maximum Per- (MPE) of 3.9 R. Naval Station, New Orleans, Louisiana. One individual from this station appears on the Consolidated List for TG 7.1, but his test activity cannot be identified. Naval SupplyActivity, Brooklyn, New York. One individual from this or~ ganization was badged with TG 7.1, but his test activity cannot be identified. Naval Schools Command, Treasure Island, California. Four men from this organization were used by NRDL in Project 6.4, all in the "Personnel Protection" (radsafe) activity. Exposures for this group are somewhat lower than for others who participated in this same activity for Proj- ect 6.4. Exposures for Naval Schools Command men are given in Table 59, which includes a fifth man whose activity cannot be definitely associated with any test project or other discrete activity. 338