2.2.16 USS PHILIP (DDE-498) The PHILIP was providing plane guard for the BAIROKO when the two ships encountered Shot BRAVO fallout at approximately 0800 hours, 1 March. Intensities rose rapidly and by 0900 hours, average topside intensities had reached 750 mR/hr (Reference 10). Although not stated in the deck log, the washdown system was probably activated at this time and all unnecessary personnel were ordered below. At approximately [000 hours, when the fallout had ceased, decontamination efforts probably paralleled those being carried out anboard the BAIROKO,i.e., fire hoses were broken out and the weather decks flushed with high pressure water (see Section 2.2.4). This assumption is supported by the relatively rapid reduction in topside intensities between 0900 and 1200 hours (H+2.3 to H+5.3) as evidenced in Figure 2-27. Another period of fallout was encountered by the PHILIP between 1600 hours and midnight, | March, when intensities increased to approximately 200 - 250 mR/hr before they began to decrease. Figure 2-27 depicts the BRAVO fallout on the PHILIP. It does not appear that attempts to decontaminate after 2400 hours, 1 March (H+17), were very successful; the rate of reduction in topside intensities is not much greater than would be expected from natural decay alone. During the early morning of 27 March, the PHILIP was on patrol east of Enewetak Atoll and, at approximately 1030 hours, it joined company with the LST-551 enroute to Bikini. While steaming in formation, both ships encountered minor fallout from Shot ROMEO at approximately 1500 hours; average intensities of approximately 3 mR/hr were recorded on both ships (See Section 2.2.11). At approximately midnight on 28 March, while on patrol south and southeast of Bikini, the PHILIP encountered the same secondary fallout from the ROMEO cloud as that received by the ships anchored in the lagoon. Shipboard intensities reached a maximum of approximately 20 mR/hr at 0400 hours on 29 March (Reference 10). Figure 2-28 depicts the reconstructed radiation environment on the PHILIP following Shot ROMEO. It is almost identical to the environment onboard the LST-551 (Figure 2-22). Shots BRAVO and ROMEO were the only two detonations that resulted in the ship receiving significant fallout. 101