however, it does mean that any average exposure extracted from the Consol- idated List data will be high because some zero readings were not included. After shot BRAVO the maintenance of exposure records became a function of each task group, with TU 7 serving as the task force interim repository. Each task group ".. . was required to send an alphabetical roster of per- sonnel in triplicate to Task Unit 7." The exposure records “included not only exposures of persons with film badges, but also estimated exposures of other persons based on film badge readings of people similarly exposed" (Reference ll, p. lla-12). TG 7.3 employed two different systems for categorizing these exposures. Under the first regime, used within TG 7.3 only, units filed weekly reports with task group headquarters, which separated the accumulated exposures into nine categories: 7.8 R. At a later date 0-1 through 6-7 in 1-R increments, 7-7.8 R, and over (not determined), the joint task force command in- stituted a different reporting system, requiring that reports of individual accumulated exposures from all task groups "four days after each shot” be organized into the following categories: 7.8 R. 0-2.5, 2.5-3.9, 3.9+7.8, and over Both systems, however, continued in use, and all Navy units filed two separate reports of personnel exposures (Reference 11, pp. lla-13 and lla-14). Roughly 40 percent of TU 7 activities involved the maintenance of these exposure records for more than 10,000 individuals. Their accuracy reflected the accuracy of the individual task group personnel sections, individual cooperation in designating proper home stations, and cooperation in returning film badges for processing. Duplicate sets of exposure records for TG 7.1 and TG 7.5 were maintained at the Bikini and Enewetak Radsafe Centers. Usually, these duplicate rec- ords were available about 36 hours after exposure. TG 7.2 and TG 7.4 main- tained operational control files within their respective headquarters, TG 7.3 maintained operational control records aboard each ship. Upon com- pletion of Operation CASTLE, the records were disposed of as follows: 105