tho report has a primary operational viewpoint, and frequently departs in phraseology and precision from the normal standards prescribed for a purely technical document. Since various independent technicel investigations have been completed, or are in process, which closely examine the orny facets of the radiological effects of the CASTLE events, the need for 3 coverage of the operational viewpoint appears vital for continuity and development of better opcrational means of coping with the problems. &. The following general information on special aspects of the C..STLE Operation is presented as background for Parts TWO, THPREZ, FOUR and FIVE. &. Seven detonations had been scheduled when the task force arrived in the Pacific Proving Grounds. Five of the original seven, plus one substitute, were actually detonated, b, The planning date of 1 March 1954 wes established for detona- tion of the first shet. (1) The original shot schedule, probable yield and presuced range of yield in magaton, wast SHOE PROB..BLE PRESUMED RANGE DETONATION ae (BRAVO) XYKEE) . “(Later revisedto Late T Maren 1954 1-18 1 Mareh 1954 6-10 22 March 1954 .125 2-3 4 065 = 4275 1-5 15-7 29 March 1954 8 april 1954 15 april 1954 1 0.3-2,5 $-10 ~ (UNION) YIELD h-8 “«4 with yield 98 and range of 7.5 = 11.5 (ECHO) " (NECTAR) (ROMEO) (KOON) (22 april 1954 (2) Because of adverse weather, the effects ef BRAVO end