fall-out. Shot related activities of the task group varied with the location and type of detonation. Procedures used during the first seven shots of the operation are as follows: LfmossE mm (-ToK): Special instructions for LACROSSE event (~ May) were issued on 2’7April 19S6. To insure the safety of personnel at ENIWETOK all personnel not performing spe. CifiC duties at shot time were assembled. The flash-blindness hazard was considered a definito possibility so all personnel not equipped with high density goggles faced away from the zero point and closed their ems prior to detonation time. Two routine sur. veys resulted in negative reports on all ass@ned areas except in the vicinity of the ENCCWI!lTOK Island sample recovery area where radiation danger zones had already been established. WEROKEEEVENT (BSKINI): Task force personnel in the BIKINI ~~ea were evacuated aboard ships prior to CHEROKEE event (21 May 1956). Nevertheless the same flash-blindness precautions were included in the instructions for personnel in the BIKINI erea. No precautions of this sort were necessary for ENIWETOK. In addition, no post-shot surveys in the ENIWETOK are?.were re. quired. zum mxfr (BIKINI): The pre.shot instructions and pre. cautions for ZUNI event (28 May 1956) were essentially the same as those for CHEROKEE. Low level fallout on ENIWETOK Islcmd was detected at H plus 9$ hours, and a survey commenced about H plus 10 hours. Fsllout intensities ranged from O.lS to 0.30mr/hr.