operation. The time-dependent below-deck intensity is so obtained for each ship. Numerical integration with a timestep of 0.01 day generates the personnel exposures. This time step offers a precision compatible with that of the position-time data for the ships. The Bikini Lagoon contamination after each shotis discussed below. Shot BRAVO Although significantly contaminating the lagoon, BRAVO more immediately impacted ships and islands through heavy fallout; hence, the reported rad-safe data emphasizethe latter. The applicable land-based intensities (H+1) are 150 R/hr for the Nan anchorage, 50 R/hr for Tare, 500 R/hr for How, and 1,000 R/hr for each of the northern operating areas. Corresponding water intensities (D+1) are 10.5, 3.5, 35 and 70 mR/nhr, respectively. Shot ROMEO Lagoon contamination from ROMEOwassignificant only in the vicinity of surface zero. This affected the Charlie area to roughly the level of 1,000 R/hr (H+1 land value). A D+1 water intensity of 70 mR/hr is implied. Shot KOON The Tare anchorage wasprincipally affected, yielding land values (EnemanIsland) of 500 R/hr at H+1; H+1 land values of 7, 50, 100, 120, and 25 R/hr pertain to the Charlie, Dog, Fox, George and Howareas, respectively. Corresponding water intensities are 35, 0.5, 3.5, 7, 8.4 and 1.75 mR/hr (D+1). The Nan anchorage wasunaffected. Shot UNION Because of low waterintensities (0.5 mR/hr, D+1, derived from 7 R/hr, H+1 on land), ship contamination at the Nan anchorage was appreciable onlyafter five days post-shot (Reference 7). Project activities in the northern lagoon involved much greater intensities. In Areas Fox and George, water intensities were at least 14 mR/hr on D+1 (200+ R/hr land intensity at H+1). In Area How,a land intensity of 150 R/hr (H+1) corresponds to a water intensity of 10.5 mR/hr (D+1). COCOPA, operating in the vicinity of the most intense surface zero contamination, recorded a 500 mR/hr waterintensity on 27 April in Area Dog. South of Dog, ship operations were conducted in waterintensities of about 7 mR/hr, D+1 (100 R/hrland value, H+1). 16