that the two atolls will nct always have similar, or even acceptable, wind patterns simultaneously. Further, the relative favorability of any specific wind pattern is dependent on factors other than just wind alone. At Bikini, patterns with mid-level winds from the sector southeast clockwise through southwest were considered favorable for all types of shots, with an extension of the sector to east southeast and west southwest fer barge shots. For Eniwetok, the acceptable mid-level wind directions were more flexible; the limits on cloud travel to the east could be "stretched" somewhat to allow west southwest mid-level winds for all types of shots, and the western limits of the favorable fallout sector could be extended to the point of accepting winds from at least east northeast and, with reservations, from northeast. The net result of the above was the relatively firm requirement for the mid-ievel winds to have directional components such that resultant winds to the levels involved lay within the acceptable fallout sectors, i.e., within the sectors west northwest clockwise to east northeast for Bikini shots and from about southwest clockwise to east northeast for Eniwetok shots. From this description it would appear that Eniwetok would be the more preferred of the two atolls from the radiclogical standpoint; however, other factors made this atoll less favorable. The primary considerations in this connection were the yields, the predicted range in yields of the devices, and the resultant contamination and blast damage predicted 186