wee A O oa, Ce Om ie PCACINI ENCLOSURE IV SPECIAL ASSISTANT TO THE SECRETARY OF STATE WASHINGTON February 13, 1956 MEMORANDUM FOR Mr. John A. Hall, Atomic Energy Commission. I refer to elegram 1839 dated February 9 from the Embassy at Tokyo reporting on the rising Japanese concern over the proposed tests in the Pacific and suggesting certain things that might be done to better the situation. We should appreciate receiving on an urgent basis the AEC's comments on the following actions that might be taken. In this connection Admiral Hanlon recently briefed a group of officers in the Department on REDWING and some of the following were developed as a result of this briefing. 1. Imediately inform the Japanese of the proposed marine biological survey that will be conducted during and after the test series and offer to make available to them the analyses of the data obtained. In addition ask the Japanese to join us in a joint survey of the waters outside the danger area. Further let us consider what might be done through collaboration of the International North Pacific Fisheries Commission (U.S., Canada, and Japan). 2. Immediately inform the Japanese and also the Trus- teeship Council of the details of the safety precautions that we plan to take during the serles. This would include information on improved methods of weather forecasting, location of Radiation Safety monitors on various atolls, air and surface searches to assure that no unsuspecting mariner is within the danger area, ete. 3. Increase the exchange of information on radiation standards with appropr’:.te Japanese. Since there has already been an exchange of this type of information, it might be advisable only to encourage the Japanese to publicize this point. Should the Japanese so request it, we might send another team to Tokyo similar to the one sent in November 1954. 4, Immediately inform the Japanese on a confidential basis of the fact that the danger area will be continued until at least August in order that fishing groups can make their forward plans accordingly. Unless something is said on this point the Japanese may conjecture that the period of the establishment may not exceed that of CASTLE with the result that plans would have to be changed. Ses SFT. tbsSASSAPICAMON RENAEW Bad 22h Cameteapex Oy oe — . * COE oFBy ce eae entrapMiah bf 7 P opamsaz oe 1 cb) ven — ANSON, entRB get CRTEGR atRBaro “— ‘iefie “iy Sm tate . J G jj¥ Ene i os ure SECIRI Il fl fi Iv La = ° : : ‘g