of the six events far the porpose of dcternining the effectivenase of tho wash dom system in redwing the levels of contamination resulting from expoeure to high levels of radietion from fail cut. This was one of the most difficult projects to accomplish frem an . operational atandpoint and involved the Jargest group of individuals of any of the DOD projects, The general plan of operation involved the ships from Eniwetck te Bikini, evacuating the erews at ~ soa at approximately H-2 hours and then steaming the ships under resote control through the fall out area, At approximately 1/6 hours, the ships were teken in tow and moved back to Eniuetok for decontantnation and preparation Zorthe next scheduled event, An unfortunate chif’ in the surface end lower level winds just prior to Shot 1 resulted in rather disappointing reculte from this shot. However, in the susseeding shots in which the ships participated, high levels cf contamination were received on the ships, and the project was considered to be successful. Because of the effectives ness cf the wash down systes and the shielding which was available below decks, & emall crew manned the wash down protocted ship during the last two shots in which the project partisipsted, De- contamination perscnnel ware provided by Task Group 7.5 from the orews of various ships in the Task Grow. In conjumotion with the drone ship project, representative panels of typical construction watorisla were gzposed abcard both the protested and unprotected ships, Upon recovery after the shot, these panels were decontamiarted utilising various atandard and experinental techniques. : ; §. The ioncephere studies were eerried out by a Signal Carps group operating especie ionosphare recorgers at Rongerik Atoll, Eniwetek Atoll and Okinawa, The stae tion at Rongerik was heavily conteminated by fall out frem the first abot ard had to be evacunted, Nowever, it was possible to resotivate the station for sugceeding events by sending in an cperating craw either by sea plane or surface veste] a couple of days priar to the ehcot. These personne) would activate the station and then return after the shot to resoyer the records, Three Signal Corps mn who were operating the Rongerii: station at the time of the heavy fall out from Shot 1, wore initially evacuated to Eniwetok Island because it was balieved that they had received a total dese of approximately 90-100 r rediation, I¢ was the desire of the medical personnel conducting Project 4.1 at Kwajalein to have these man repet to Kwajalein for sbservation, Comsander, Joint Teck Fores 7 oppoacd this request on the grounds that the psychological effect -367= mMAlfe "