| INCOMING. WESSAGE PROM: CINCPACFLT JO: CUTP SEVEN ENIVETOK “1. DTG 1202382 FEB 1954 Subject is aFOAT=1 CASTLE Participation, AFoaToL Letter OPNS 370.009 dated 23 Dec 53 and CJTF SEVEN letter Jo3/729,3 dated Ll Dec 53 refer. In accordance with ay concept ae stated in paragraphs 7.8.2. and 7.f. CINCPACPLT lettor serial: 001855 of 31 Oct §3,-consider best use AFOsT services can be obtained ty extending JTF tracking capabili- ties in downrind sector. . Such use will provide acre information to following sources for purpefes dadicateds - a. To CJTF SEVEN- in capseity of. advises.to CTUCPACFLT on special hazards and danger areas incident CASTLE. b. to JT? SEVER fadsafe evaluation center : for detinition of predicted cload trajectories in areas outaide the test site. G. Te ARS Project. Officen in JTF SiVEN. for mere affactive coordination of worlduide. fallout aondioring. progres. . Ct 2. For above reasons propose following AFOaT participation: a. Cloud track in downwind sector beyond termination of JTF SEVEN offort as dirvetad by CJTF SEVEN. b. Time duration and region based on ‘post shot developaants as reviewed by CUTF SVEN. Ce Preoision similar to efforts of JIF SEVEN sircraft. ad. Message reports of aigificant intensities to CJIF SEV=y. Readings below 10 mr/hr considered insignificant and will be expressed ae negative ruports. Such reports should include information which confirms or othorwise aids CUTF usVaN forecast atomic cloud trajactory for initial 72-hour period after dotonation. 3. Foregoing pursuant ny concopt tht all roports pertinent to hasarde and dangor aroas incident CaTLi will be ovalu.ted by CJTF SUVEN in formulation of appropriate safcty advisorics to CINCPsCFLT. Soparate ruports fron FO.T or other agancics to CLYCP.CFLT not desired. Propoeo CUT? SUVEN coordinate details with .f0.T. be (Maw but realited subject) Intcnsitius below 10 ar/nr recorded 5. Raquost messages coanant. by aFO..T sirermft during normal routine aiseitons aay provics vilucbla doeunentation for oxtending all knowlodgs of worlenids fallout pattems even though insignificsnt for Redsafe purposus. If aX Project Officor desires such informtion consider he should arr.ngw handling vin ~il. ¢-37 ——. Inel 7 to TAB "C"