devices desired, which was ip turn partially dependent upon certain diagnostic information from the Nevada UPSHOT/KNOTHOLE series in the Spring of 1953. bd. Having determined the design or model to be followed, production capabilities on certain critical materials appeared to be another Limiting factor affecting specific dates. c. Bomb site locations: with the advent of shots such as GEOBGE (GREENHOUSE) and particularly MIKE (IVY) it was realized that careful consideration must be given to the bomb site locations in the Forward Area. The primary concern was the residual radiological effects which might,post CASTLE Operations. The utilization of barges appeared to be one means of alleviating some of the radiological problems, but until after CASTLE experiments its effectiveness will not really be known. a. | The detonation of the device: Only after the location and probable yields are settled can it be determined whether or not the device should be fired by a radio circuit or a direct circuit, and whether or not television is essential to support the firing systex. e. Diagnostic measurements desired: ; Theoreticians cannot, ‘except tor _ standard experiments, determine the desired diagnostic experiments until designs become firm. The failure of early agreement on these experiments in turn delays critical construction in the Forward Area. These experiments may well dictate such thin complex block houses, etc. D. February-May 1953: 1. The factors enumerated above are those However, in spite of not knowing the SN as to scope and specific schedules.