"TAB Ki" oe a he -e ~ apres aw, 0? KOON — £.+.-— - “mys “7° %, The first attempt to fire KOON was 6 April, This headquarters and«‘ task group staffs deployed to Bikini on 5 April and set in motion the entire sequence of pre-shot events, Area GRESN was searched on 5 April - plus a seotor search 24,0 NM wide to 600 NM centered on 30° true from CZ. Complety advisories were issued to the British Sampling Unit on Kwajalein and to CICPACFLT. Forecast surface and air RADEXES were issued to all task force units. The series of briefings continued until midnight; ul- tinately resulting in a postponement of the shot for 24 hourse PC 1546 had been ordered to Rongerik to serve as floating housing for the weather detachment and Project 6.6. Arrangements had been made for the Officer~in-charge, Wake Island ‘/eather Bureau Station to assums radsafe momitor responsibility for ‘Nake and to make special rcports to the task force headquarters if and when intengitics passed through 10, 50, 100 and 500 mr/hr and as required by cirewnstances above 500 mr/hr. Radiac instruments were supplicd to the ‘lake station by TG Tete In ac= cordance with operational requirements the task force flcet was positioned in a sector from 90° to approximately 120° from GZ, minimm: distance 26 NK. ' > By morning of 6 April the synoptic weather situation was such as to forecast favorable shot conditions for the following day, At approximately Loci, 6 April, the forecast surface and air RADEXES wore issued as fallows: Surface RADE: True bearings from GZ 240° clockwise to 70° radial distance 90 1% for H to H plus 6 hours plus a circular RADEX around GZ of 15 NM. A recomondation was included with the surface RWWEX to move the Control DDE to 240° and 90 NM fram GZ, and to move the task force ships to a southcast position from GZ as soon as possible post-shot. Air RWWEX: H GZ): plus 1, 10,000 fcet and up (truc bearings from ° 240, clockwise to 20° maximr: distance 20 NM 20° clockwise to 85° maxisum distance 30 NM 40,000 fect and up (truc bearings from GZ): - 240° clockwise to 10° maximum distance 25 NM 10° clockwise to 95° maximm distance 45 NM For H plus 6 hours nultiply above distances by six. Duc to initial cloud growth, supplomentthe 10,000 Hel