5. SPECIAL CLOUD TRACKING (WILSON) FLIGETS: . a The first of these flights, Wilson 2, wes directed by Rad Safe to pre-planned post=-shot seerch. This requireé tse aircraft to remain in a holding pettern track apprcozizcately 50 miles West of Ground Zero from plus two to plus five hours. This portion of the track was designed for the purpose of dee tecting radioactive cloud movements toward Eriwetok gtoll. oo BRAVO the maximum activity encountered wes less then 15 cr/hr. Through a misunderstanding of control procedures, wilson 2 ovesstayed in the holding pattern. When Rad Safe realized this fect, CIC was requested to order him into the previously designeted search sector at once. The delay, however, resulted in tris aire craft being well behind and to the North of the cloud seszects thet must have caused fallout on Rongerik and Rongelap. gt 155m) the aircraft reported its maxirurm reading during this fligts. cls wes reported as being between 500 and 1000 ar/br approximately 150 nautical miles from Ground Zero at a bearing of 60 desrees. This and the subsequent deta appeared to verify the forecast cloud trejectories which indicated the upper cloud segments would leave the PPG on an approximate bearing of 70 degrees, thus avoiding the populated atolls. Wilson 2 subsequently reported iz-flight difficulty with the instruments used. be On the the second tracker, general area but to cloud movement. st besis of the results of the Wilson 2 flight Wilson 3, wes instructed to search the sase proceed further East to define the rate of approximetely 2000M information was recetved indicating the possibility of some contamination in the Rongerik/ Rongelap area. 4 message was immediately dispatched to Tg Fh requesting Wilson 3 to alter his search area in such a manné> as to cover ths populated area to the East. Communication delays prevented Wilson 3 from complying with the request. This plus the fact that no exact instrument readings (instead a range of readings) were reported made interpretation of cloud tracking data difficult. Ce Subsequent Tilson flights ( for plus one day} were cancelled when it appeared that no sir contamination protier ert- isted at that tim. 6. 7 af / WEATHE RECONNAISSANCE FLIGHTS: Two Petrel Juliet veether reconnaissence Tligits were flown on plus one dey. ‘These flights were flowto toe Sosth ang to the SoUtheast and indiceteé essentially zero air conta=-cét.cse 2 are