sides wet and to romain alert to the possibility of early fall-out. concern was precipitated by the early and calncus splash-out of at and above the tropopsuse and the consequent produstion of an cver= lip of the cloud to poeitions extending over the fleet. Due to southurly wind flow balow the tropopause, no contagination frog the eloud lip was foresaat fcr, or reached, the fleet. ; By 100M an alert advisory was iseued to all. task forse mite, stating that the H plus 3 hour preliainary damage eurvey indicated sites TARE through OBOS were not appreciably contaminated. For planning purposes B-hour (re= entry hour) wae designated as 200M. CTG 7.3 wee dirested te have the tase force vessels stand-off the lagoon entrance at LIOGM pending the cut—, come of the lagoon w.ter survey at the anchorages. The advisory further stated thatat Rehour unrestricted radsafe clearance would be declared for sites OBOE through TARE and for all air and water traffie south of TARR and NAN anchorages. All re-entry axsept 0803 through TARE and all air and surface traffia north of the anchorages would be placed under the control of the Radsafe CRITER of TG 7.1 at Rehour. Upon confirmetion of R-hour, all, units were dirested to commence re-try in accordance with previous instructions. Boglnaing with thia shot, and for all subsequemt shots, trief informa], advance notice of Rehour plans was passed by voice to CTG 7.3 to facilitate rapid asseably and re-entry of ships. At 1200an advisory directive was issued to all units specifying that cloud tracking flighte since H-hour indicated no radiation hasard to surface operations or to flight operations at any altitude below 20,000 feet south of Bikini and within 60 NM of GZ. The results of the preliminary la~ goon water sampling were used as a basis for a statement that the TARE and NAN anchorages were below safe radiation liaits, The advisory further stated that the H plus 4 hour radsafe/dansge survey indicated OBOE clockwise through BRAVO and NAN had received no further contaaination from ROMEO. Rehour was announced for 1300M at which tise recovery operations would be controlled by the Radsafo CENTER of TG 7.1. Sites OBOE through BRAVO and all water and air traffic south of TARE and NAN anchorages were declared radsafe unrestricted. Swimsing in the lagoon was prohibited until further notice. Le§