nave similar, or even acceptable, wind patterns similtancously, Further, the relative favorability of any specifie wind pattern depended scanewhat upon the factors other thm vind alone, sich as yield, similarity of shot site conditions wth the two general types discussed (1.0. land surface end lagoon surface barge types), stage of completion of the test series, prev cus efforts to evacuste both native and test personnel and variations in the height of the tradewinds (i.e. tradewinds appreciably in exsese of 20,000 feet place NTWETOK in an unfavorable position for BIKINI land surface shots certainly, and progressively so for barge shots). (a) BIMINT hodographs: Pattorns with mid-level winds from the sector southeast cloeindse through southwest were considered fawrable for all types of shots, with an extension of the sector to east scutheast ami west southwest for barge shots; The sore southerly the com ponents in these levels, the sore favorable the pattern became, with the exception that mid-level winds moving strongly toward WiXE Island were considered to be less favorable for a Lend surface shot, but reasonably favorable for a barge shot. The limitations on the sector to the east ant west were anrtirely due to the native atclis to the east and ENIWETOK to the west. | (b) MNIWETOK hodogragh: Por SWIWETOK, the acceptable eidelewel wind direstione were acre flexible in tw najor respeets, First, the limite on cloud travel to the east sould be “stretched" scmewhat to allow west southwost mid-level winds for all types of shots. This was due to the fact that the fall-out impact on BIKINI was not critical due to flexthility in plans for moving any test personel fran that arca, and due 63