’ This evacuation could be on an austere basis utilizing existing ships in the area and with a "standing roan enly” philescphy, - dd. At one time it appeared that it might become necessary or desin able to leave small mmbers of emergency andutility persennel at the ENINMAN site during the NAMU and barge shota, In this event it was recommended that she plan include only a few peeple (on the order ef two er three helicepter leads) to remain where their presence was necessary to man instrument sites, camp utilities or airstrip emergency equipment. Should it become neccssary, this small mumber ef peeple cculd be drawn off rapidly enough to prevent accumulation of high exposures, Although it was recognised that even large numbers could be evacuated within a reasonable longth of time and with perhaps enly mild ever-expesures, gach an evantuality could conceivably hamper future operations by using up for a large mmbor of personnel om ome shot most, if net all or more, af the authorized radiation expesures for the entire eperation. e. As the shots pregressed it became mere and more apperent that the Planning assumptions were justified. Except fer the yield of BRAVO (which effectively aggravated ari exaggerated all the adverse features in the existing wind structure) the assumptions were sufficiently valid to predict the end result with a fair degree of accuracy, As a general statement BRAVO behated to @ great extent like a highly contaminating surface burst over a wide plane ‘ef earth. The great amount ef sclid material carried up into the colum end mushroom returned to the ground ferming roughly a circular iscdose line pattern en the shot atoll. Leng range down-wind, this shet preduced intensities mich higher than hitherte seen or expected in test operations to distances up to Contamination ef the 300 miles ever a period ef approximately 12 to 18 hours. ENYU and_ENINMANcam sites was predicted from the. BavO.uind asttarn. alineuch we 23