requirements therefor. 12. Prepare appropriate technical reports at the conclusion of each shot and at the conclusion of the overall . operation. 13. Provide CJTF SEVEN with statements of preliminary test results at HA1, Hf12, and H/72 hours. In order to accommodate the scientific concept of CASTLE to an operational focus, intensive operational planning was gotten underway at Los Alamos early in 1953. The general pattern of the scientific concept had been established by the first of February. A six-shot schedule was visualized at that time and it was to be changed very little during the next few weeks. "By early April, however, a general concept carrying a revised schedule was publish- ed. This schedule was the end result of a lengthy séries of confer- ences and extensive planning throughout February and March. It established dates and site locations for six detonations. As has been indicated in Chapter I, a so-called "quick-and- dirty” shot capability was planned for the Fall of 1953 and though task group planning progressed during the period under discussion with this possibility in mind, the shot did not materialize. Anoth- er shot which was considered but not included in final plans was a surface shot over deep water. Toward the end of March, 1953, a message from AFSWP to CTG 7.1 stated that DOD could commit $300,000 for such a shot. By late May, however, the plan had to be abandoned because the yield of the device to be used was calculated to be too high for reasonable expectation of success in underwater pressure 52