= 7 . git In addition to interpreting COis sane direct interest in just fallout on water surfaces, 3 Particularly as cities such as Milwaukee and > Chicago are contemplating more and more interest over waters, Our other interests are that Scripps is also attempting to obtain basic information on the way the ocean disturbs this picture so that in the future these types of surveys can be done on somewhat simplified plans, The NYOO has a method of determining the delineated fallout area by aircraft. Essential to this is the knowledge of the nature of the mixing processes, We will try to relate this to oceanographic factors and will have to measure these carefully, so that the aircraft data can be interpreted ade~ quately. We hope, perhaps, that the next time such fallout studies can be made in a much abbreviated way. Basic to all this is a very considerable knowledge of the way the ocean operates, particularly the way it distorts the pattern, Consequently, on this program, we ine tend to have an oceanographic vessel out there scme weeks before the event, under the leadership of Horrer, and intemd oceanographic information to be taken so that this can be accomplished with a high degree of certainty. Operational procedure than is tied in very closely with the NYOO and with NRDL. We hope to establish a central plot. I think this may be better done (I'l just briefly mention this) if the three participating agencies have both the incaning and outgoing information at some central source, presumably afloat, with good canmmuni- cations to the ships, Particularly important in this and in the preceding oceanc- graphic survey is sane precise navagational control. This is under discussion at this time. This is very essential both to the aircraft and to the ships. We have asked for two destroyers for late D-Day probably and until D¢2 to assist us in the oceanographic vessel in delineating the area at samething that approaches a synoptic survey and in obtaining some early information on penetration, Penetratim information will also be gotten from YAGs. The oceanographic vessel, being slower, will go in Slowly and get later information on the penetration and cover the area for same days depending on the schedule. In addition to this we are putting out sane deep-moored stations. We think we will put out approximately 16 up to the north of Bikini Island and these will go out to a radius which has not been determined, but somewhere between 20-50 miles out, and they will be scattered out up there. Those, we hope, will survive during the entire operation of these big weapons, They willbe similar to the type of deep-moored stations that were put out for IVY and WIGWAM, except they will be designed for longer life, NRDL will have fallout collectors on them and we will have simple penetration measuring devices that will determine at least the arrival of the mixed fallout products at several levels. There is, I think, sane duplication of effort here, and there is no doubt that sane part of this program, if everything went well, would ace complish the objective without the camplete participation as planned. I believe it is the feeling that this is a preblem of sufficient exigency that it has to be backed up; hence, we are most anxious togt the destroyer information. We want to put ourselves in a position, if there is a delay of two days getting in there for any unforeseen operational reason, to be able to get the best information that can still be obtained. Present plan is for participation on Cherokee, Zuni and Navajo by these three agencies; I think there will be no participation in any of the Cop; ‘Ali,pfbOE “3 5 :} —.. Ae