CINCPs.C FILE FFla1 AL=3 Ser 001355 - at 3L Oct 1953 ia the Marshalls, units of JTF 7 would be required to accomplish this emergency measure upon the requaat of CLICPaCFLT. - @. Advisoriss issued by CUTF 132 during IVY (partgraph § sbova) word entirely satisfactory and are similarly desired for CaSTLzE subicct to the deletion of unroalistic zeasures by mutual agroomsnt. Altnhcugh health hagarda of the magnitude surmised for IVY appear unwmrreantcd on tha baais of that singular uxperiensco, it is cansidured that enz downe~ ward rovision of the safaty measures Leplamented for IVY should be justified with roferencs to scicatific findings tending to support tris surrent radsafe concept. To determine sdaquate CASTLE precautions, CIMCPACFLT deeiros recommendations from CJTF 7 waien include a full evalustion of moseures instituted for IVY 18 sot forth in percgraph 6 abowe. In such analysia, it should be borne in aind that CINCPACFLT has previously agreed to conduct airborne aonitoring (subparagraph 64(2) above) in coeperation with the Atomic cnergy. Commission. e. Reference (c) and (e) as briefly outlined in paragraph 4 above constitute basic CINCPAC directives iasued for Operation IVY. It is contemplated that the basic policies in these references will be retained for CASTLZ and reissued as new directives prior to the operations. £. Prior to IVY, CINCPACFLT requested information on the long range detection program sponsored by the U. S. Air Force Office of Atomic Tests (HQ USAF WASHDC (aFOaT-1) which could be used to advantage in the radio- logical safety program during the operation. Thie request furthar pre= vided for AFOaT-1 to furnish any information that might be obtained on the lecstdons of the clouds from the IVY explasions and the calculated intemedty in these various Pacific flights onde by aireraft aquipped with air filter devises. In genoral, the intensitias rocorded were insignificant sand thease flights reflected no pattorn of correlation with the actual stemtas clond tracks. In view of thu AFOaT=1 cooperation received for IVY, is.ds- euggosted that aFOAT~l be roquosted to supplasent JTF 7 tresiking- da erder to provide information of 6 dugree essontial to CINCPACFLT for the discharge of nis responsibilities incident %o Pacific safoty. @ Under the proposed redsafe plan, the daily information summaries for the post-shot weak (subparagraph $a(3)(b) above) would be based only om radiological reports from fixed wather stations. Considoring tne einute number ef such stations in relation to the vast uxpansa of the Pacific grea, these roports will not be nearly as roliable 13 those dure ing IVY and will havo no value in arcas beyond tho vicinity of th. woatha stations, C-9