CINCPAC FILZ FFl<1 AL@3 Sor 001355 ‘ee 31 Oct 1953 1. Claud tracking to 1000 adlee in the significant 2. Monitoring of water samples from certain inhabited 3. Radiological reports from fixed weather stations, quadrant, probably|northeast from zero point. atolls to a radius of epproximately 500 ailos. 6 Safety Nessuros in the Pacific Ares During IVY. the: a. Inm.order to provide for the safety of areas and units other than those assignod to JTF 132, CINCPACFLT implemented ths following xecsures for IVY: (1) Teaporary evacuation of Ujelang by a PACFLT vessel. (2) Airborne surveys of the Hawaiian, Marshalls, Carolines and Marianns Islands supplomented by ground checks as practicable as outlined in reforence (b). (3) Pin badge survey of “ake and Johnston Islands. (4) Reconnaissance flights (by security alreraft in 1G 132.3) to clear itinurant shipping from the predicted cloud passage area cut to 800 miles on M ainus 2 and H ainus 1 days. ' (5) Informod the CAA Ninth Region administrator about the poe giodlity of intorfarense with air routes through “ake for short periods of time (6 probability concluded by CJTF 132) and msde arrangenents for closing or modifying these routes on short notice in the event such actics becans essential. (6) On the basie of redsafe advisories from CJTF 132, the Kwa j= alein-Gusa air route was closed froa H to H plus 24 hours for LOKE shot only. (7) For operational resacne as requested by CUTP 132, both Kwa}: alein and Eniwetosk Air Bases were closed for short periods before and after such detonation. 7. Comments on CASTLE Radiological Safety Plan Proposed by CJT? 7 (pars. grapn_< a. above. . "Mth respect to atamic cloud tracking outside the imnediate ae CHE