E. June - September 1953: 1. Meeting of all project officers: ‘ 12 ) This meeting on 23, 24 June 1953 included the projects officers of the DOD, LASL and UCRL experimental programs. The meeting proved to be the medium by which objectives and methods of the respective projects and their concomitant operational requirements were presented by the project or program officer. (In brief, this was the first time that the operational problem presented by the experimenters became known ‘to the Task Group organization.) ‘Thereafter operational portions of status reports kept these requirements current. The basic research necessary for the publication of a document describing the projects was initated subsequent to this meeting (ONO Book). 2. Specific support requirenents: As a result of studying the specific problems presented by the project officers and the overall detonation plan of weapons/devices it was possible to initiate specific requirements for the support of the (divergent) experimentation and each weapon/device. These included such items as specislly modified LCU'’s, LCM's barges, aircraft, etc. Certain time scales became known which permitted the establishment ofphasing . charts as applicable to weapons/devices assembly and certain of the more a complicated experiments. 3. A "Concept* of CASTLE wes issued in June 1952 13),etting forth general | plans pertaining to the carry-over of personnel » relative scope compared with / (12) IR J-18148, 27 May 53, From CTG 7.1 to Project officers, TG 7.1, Subj: “Project Officer's Conference". (13) OUO Ltr J-12350, 23 June 1952, from CTG 132.1 to Distre Subject: “General Concept - Operation CASTIE". J-Div files » SSIE ates