Section 1 INTRODUCTION Operation CASTLEwasa series of atmospheric nuclear tests conducted by the Atomic Energy Commission (AEC)at the Pacific Proving Grounds (PPG) during the Spring of 1954. Radiological safety procedures generally included the issuance of film badges to about 10 percent of the personnel throughout the operation and to individuals during periods of potentially significant radiation exposure. Cohort badging, defined as group dose determination from one badge wearer, was the primary meansof determining individual exposures. Recorded dosimetry is available for most personnel assigned to the ships. However, it is noted that available dosimetry forms are incomplete as to dates and times of recorded exposures. Moreover, recorded dosimetry from cohort badging has been shownto be not always representative of the entire cohort due to dissimilar activities within the group. Hence, reconstructed doses, including uncertainty analyses, are necessary for high-confidence assessments of the doses received by these personnel. Reference 1 reports the results of dose reconstructions for personnel on sixteen of the ships participating at Operation CASTLE,as well as for island-based personnel on Enewetak and Kwajalein Atolls; this companion report documents the analysis for eight additional ships of interest. The methodology of Reference 1 is employed herein. Appropriate material from the reference is repeated for reader convenience. For brevity, detailed derivations, discussions, and listings are cited but not repeated. Asin the case of the sixteen ships evaluated in Reference 1, this report describes the operations, the radiological situation, and the time-space relationships of each of the eight ships with respectto the radiological environment. The results are portrayed as equivalent film badge doses for the crewsof each ofthe ships. 1.1 BACKGROUND. There were six shots in the Operation CASTLE test series: BRAVO, ROMEO, KOON, UNION, YANKEE, and NECTAR. Thefirst five were detonated on Bikini Atoll; Shot NECTAR was detonated on Enewetak. Figure 1.1 depicts the locations of Bikini and Enewetak with respect to the other atolls comprising the northern Marshall Islands. Figures 1.2 and 1.3 show the main features of Bikini and Enewetak, respectively, and the locations of the CASTLEdetonations; the pertinent details of each test are summarizedin table 1.1 (Reference 2).