mins» Ag -- RETYPED COPY -HEADQUARTERS, Joint Task Force SEVEN Washington 25, D.C. 10 November 1953 Appendix II to Annex N Radiological safety, CJTF SEVEN Operation Plan No. 3-53 RADIOLOGICAL SAFETY OFFICE AND CENTER l. A JTF SEVEN radiological safety office (RadSafe Office) and a TG 7.1 radiological safety center (RadSafe Center) will be established for each shot. The RadSafe Office, manned by personnel of the Technical Branch of the task force Operations Division (J-3), will operate as the task force agency responsible for the dissemination of task force radiological directives, the presentation of radiological shot briefing material and the maintenance of displays of radiological information having an impact on the overall task force mission. The RadSafe Center will be established by CTG 7.1 and will serve as operations headquarters for the radiological safety activities of TG 7.1. Pertinent data collected at the RadSafe Center will be forwarded to the RadSafe Office at the task force command post. Detailed Duties a. Radsafe Office (1) The RadSafe Office, in coordination with CTG 7.4 who will develop the air RADEX plot, will assemble the overall RADEX situation and disseminate the air and surface RADEX prior to shot time (fore- cast) and will originate messages from time to time after shot time announcing R (Reentry) Hour, radiological clearances of previously closed areas, radiological directives to task groups, advisories to commands external to the task force and revisions of the air and surface RADEX as required. (2) The RadSafe Office will be responsible for the preparation of RadSafe forecast information for the shot briefings. (3) The RadSafe Office will maintain displays of radiological information pertinent to the test area and having an impact outside this area to include radiation levels on atoll islands and lagoon, RADEX information, cloud trajectories and their relation to occupied atolls and air and surface routes contiguous to the danger area, ship movements in the danger area, results of water sampling and such other items of special radiological consideration as may be required by the Operation or the scientific projects. (4) Physical Locations of the RadSafe Office a. For BIKINI ATOLL shots: Command ship 460