fas. TIBACCO KVENT QPERATION HARDTACK 1. The TOBACCO device was detonated 3,000 feet northwest of Janet Island Eaiwotok Atal, at 14154, 30 May 1952.amma gunk: eloud rose only to 18,000 feet, then stabilized at 16,000 - eet at 1430M. The portion of the cloud below 10,000 feet moved in the direction of 280 degrses at 22 knots. The upper portion moved in the dirsction of 325 degrees at 10 knots. 2. The P2V reported over Fred at 1515M, and it was placed on barrier patrol between Yvonne and Leroy. Readings of Zero were obtained on this line, so the aircraft wag yectored northward in 10-degree increments frem lercy. No significant readings were cbtained on this sweep. The plane was then vectored at 1630M on a track of 280 degrees from Leroy for 20 milas. No significant readings were found on this leg either, so the aircraft was released. 3, The helicopter survsy vas initiated at *wo hours after shot tire, Xt was interrupted over Yyonne by low clouds and rain, but the survey was resumed by 120M, The highest reading was recorded on Janet: 120 mr/hr. Other readings along the northern chain ranged from Zero on Wilma to 16 or/hr on Mary, 4. reer Fallout fell well within the confines of the forecast fallout plot. O00 T S E B ww" ~~F or ary TAB A [35