By 1000M an additional advisory directive was issued to all units confireiing Rehoure This dispatch stated that cloud tracking and cther operational flights singe H-lour indicated no radiation hazard to sume face-oporutions of ta flight operations at any altitude south of Bikini. Itgdviget that tho preliminary lagoon wator sampling indicated NN an~ choreges bolow safe radiation linits. Further, it included tho Radsafa survey«in mr/hr contamination as follows: SUG.R 45 nacimm, air strip 15, UNCLE 25,000 at 300 fcot, T..RE anchorages 3,000 at 25 feat, NN. 25. R-hour was announced for lOOCM, and that cffoctive at Rehour, re=covery spirations would bo controlled by the Radsafe CENTER of TG 7.1. Wator air traffic in tho vicinity of NiN anchoreges and to the air strip was declared radsafe unrestricted provided no landings were nade on islands other than OBOZ. All other watcr and air traffic was do- clared subjoct to clearance by the Radsafe CENTER. Swimming in the Lagoon was prohibited until furthor notice. .t Rehour, all units were directod to cocmenco ro-ontry to NN anchoragos in accordanco with previous planse Due to the low yiold and the favorable observed shot day winds, NYKOPO Flight ..blo for KOON day was postponed to K plus 1 day. Throughout the shot day, cloud tracking wes routine and in ace cordance with plans. Tho fcw, low intonsity, contacts nado with the cloud did, howover, fit the forecast fall-out pattern. 8 a consc]= quence, all Wilson flights aftor Wilson 3 wora considered unnecessary and CTG 7.4 was notified accordingly. Due to the high contamination in the vicinity of GZ (in the la goon aga woll es on land), tho southwostorn portion of tho lagoon rapidly concentrated high intengitics ovor the watcr and in the slowly flushing channels to tho southwest. Specifically, Enirtiku Pass (off the west end of T.RE) wes particularly prominent with a slowly flushing, high intensity, nilky residue. .s a consequuncs, CTG 7.3 denied use of this \ channel to all ships until furthor notice. Based on the Wilson holding pattorn flights, no fall-cut was antici- \ ‘ patod at Eniwetok or Ujelang, This was verificd at approximately 190M on shot day through a report received from the radsafo monitoring systcens at Entwotok to tho effcoct that FRED, click and URSUL. wore reiding back= ground, In accordance with plan, the first (and fin-l) 2000K post-shot advissry was disprtched to CINCP.CFLT. CINCP.CFLT wis informed that further advisorios would be contingent om further circumstances. Tho advisory stated that due to the unexpected low yicld, no significant radsafe problios were anticipated. No change wes made in the forceast 72-hour cloud trajectorios . a3 given in the H mirms 18 hour cdviscry, ind 4 statencnt wag included that no health hazards wore oxistcnt or forceast for surface or air routes. The advisory further stated that no significant fall-out was cxistent or fore} cast for populated atolls, but that NYKOPO Flight ..ble hid been scheduled for K plus 1 day. CINCP..CFLT was informed th:t any KOON readings in exe ecss of 10 or/hr would be forwarded,