I cn 1. ‘This installment covers the period commencing with the ar rival of CTG 7.3 in the forward area on 24 January 1954, and ending after the third CASTILE shot, KOON, detonated at Bikini on 7 April 1954. ~ It omits coverage of special problems in security, operations, com munications and logistics, which wil be treated for the entire oper— ational period in a subsequent installment.