:3 4 40 YS oe Twenty-five secondsfo ZERO TRE,cote Twenty seconds to“BRO me, “ , 0 ae spe a * - Fifteen eeconiis te 2ERO mE,Soote ~50 to 60 =, | Ten, nine, eight, seven, six, five, ‘four, threo, two, one, - TONE. ; » ot, . " %10 sec. ‘The shock wave will arrive in a few minutes-= keep |firm ; footing until wave Passes. : a cn , * Joe An automatic time tape broadcast will, be used from H-15 minutes through ° H-Hour, . This broadcast will be synchronized with the device-firing timer, to insure time broadcast accuracy in relation to actual blast time. This . broadcast will be continual, with counts down-and hack tones given at’. 7° each minute increment of ‘the 15 minutes. BOUNDARY TARE will instruct ~ participating aircraft when to switch to VHF Channel "B" ‘for time hacks. Iumediately upon determination by the aircraft. commander ‘that hehas’ . received an adequate time hack, he will return to ‘his asSigned control ~~ channel, #11 aircraft will remainon Channel "B" fromH-3, minutes through ~ H-Hour. (C-54 Photo Aircraft only are authorized to-deviate from these instructions, during the period H-5 minutes through H~Hour,. if such *: doviatione arc previously agreed upon by the pilots and their controllers.) . _All aircraft will switch back to assigned control channels immediately — . _ following H-Hour. In the ‘event of malfunction of automatic tape broad= . ‘east, critical aircraft will be directed by BOUNDARY TARE -to return toe nn bese or to immediately depart the shot area, ._ Manual voice broadcasts "| “willbe made by BARRYMORE if the automatic tape broadcast fails, This | procedure, will enable non-critical: aircraft to complete,their mission.2