Li Wo edi. iT. ot OW! 2k TET Te operation, the total fission yield for each operation, and the types of shots on each operation, a, An original danger area, a rectangle of about 150 by 335 nautical miles about the Atolis of Eniwetok and Bikini, was in effect on Operation CASTLE until after the accident involving the FUKURYU MARU, After that accident, the danger area was temporarily extended to include. a northern sector of 450 nautical mile radius, The latter danger area, or a2 new one based on appropriate recommendations, will be used in Operation REDWING from the outset, b, The total yield produced by the six shots on Operation CASTLE was approximately 48 megatons, ‘The total yield for Operation REDWING based on fourteen shots now tentatively planned should not exceed approximately 18 megatons,. ec, However, the foregoing does not indicate the true relationship between the radioactive fall-out problems on the two operations, _ Of greater importance to the problem of world-wide contamination is the matter of fissionyield, — 1 yah ee Xr,lenaapEekere,Page da, Furthermore, on Operation CASTLE all six shots were surface bursts, resulting in the upward movement of * jarge quantities of radioactive debris from the test site, — De® %. (@s ~ 7 - Appendix "a"