UNITED STATES PACIFIC FLSET HEADQUARTERS OF THE COMMANDER IN CHIEF IN RIFLY S=FER TO CINCPACFLT FILE FFlel All Ser 00113 . ll February 1954 ~ From: Tos Commander Commander Commander Commander in Chief U.S. Pacific Fleet Joint Task Force SEViN Naval Forces, Marlanas Fleet air Hayail Commanding Officer, Naval Station Kwajalein Subj: Support of Atomic inergy Commission ‘iorldwide Fallout Monitoring Program during Operation CaSTLE Ref: (a) CINC>ACFLT Secret mag 190221Z of Jan 1954 (bo) CLICPACFLT Secret ltr FFlel Aum} Ser 00849 of 3 Oct 1952 (c) CI:iCPaACFLT Secret msg 2400082 of Sep 1952 (ad) US AZO NYKOPO Secret Ltr HSt!® of 8 Sep 1953 (e) CUTF 7 Secret ltr J-3/903 undated (£) CINCPACFLT Secret ltr FFl-1 aS6 Ser OOL2L0 of 28 Sep 1953 (g) CINCPACFLT Secret asg 3022212 of Jan 1954 (nh) CINCP..CFLT Secret msg 2204312 of Jan 1954 (4) COMAIRPAC msg 2220202 of Jan 1954 (3) CINCP:CFLT Secret ltr FFl-1 all Ser 0073 of 28 Jan 1954 1. Reference (a) advised cognizant comnanders that Pacific Fleet support of the subject program will be generally similar to that previously rendered during Operation IVY as outlined in ruferences (b) and (¢), oxcept for a reduction in the atroorny monitoring effort. It further directed COUHASEnFRON to assist .80 Project Officors in preparitory aissions pertinent to the Hawaiian area. 2. Purpose. This letter sumarizes tho details of the program and out- linss the support required from cognizant commandors. firns carlicr planning and agrocaonts. It further con- 3. Background. a. This progrem is a continuing project suportud by tho U. S. Weather Buresas and other governnent igoncios. as in IVY, wore dofinitive coverage in tho Pacific during CASTLE tests sarvos the duol purpose of extanding a0 knowlodge of worldwide fallout pattorns and issist- ing CINCY..CPLT (as agent for CINCP..C) in dischirging his responsibility for safety in the Pacific urca. . b. Tho aircorne and ground monitoring techniques previously dos~ eribed in roferonca (b) have not basically changed since IVY. Since the nX Nuw York Operations Office haa developed Standard Opersting Procedures (SOPs) for tho use of participating ictivitics, descrictiors of monitoring tuchniques are omitted in this lattar. q+ 30 : —— Inel 6 to TAB "C"