180 DASA 2019-2 in Japan to some extent, as those of you who followed the movement up on to the terreatrial area there can verify. In the atolls, the more specific ocean-to-shore transfer of radio- activity is carried on by aquatic birds. This is a cumplicated thing to evaluate, because the birds carry back on shore nuclides velectively concentrated in the food web inthe sea. This added group of nuclides is often very different in percentage compositicn as co:apared to the components in the original fallout on the land, Then, I suppose, most specifically we are all irterested in the amounts and kinds of radionuclides concentrated by the various tis- sues and organs. In making evaluations, we are always hard-pr-ssed to sort out the different parameters that are involved. We have the overlay of the effects of blast and fire with radiation intermingled, eapecially in the closed-in areas, illustration or two to point this out. If I may, I should like to use an Figure 24 ia one of my favorite photographs. It was made uncer rather unusual circumstances, since we do not rate sufficiently high on the Tack Group priority list to have the luxury of a photographic plane, We do travel occasionally—we did in .’.¢ early daye—by the older PBYa. Those of you who remember those old flying boats know that they usuaily didn't have the usual facilities found oa a modern plane but they did have a place in the back called an air- ‘flush toilet. By flipping up the lid of this fixture you had a place to take a photo- ‘graph! (Laughter}] This may tbe a bit unusual. Figure 25 is an illustecation of the type of plan that rnight be used to document some of the things I’ve been talking about. We, like the rest of you, tried to be very exact in our planning. We planned very carefully to docun.ent the distributiun of radionuclides in this great mass of moving water and drew a navigational plan In order to ac-~ camplish this objective we had to occupy various statiot.e in some logical sequence, so [ drew these plots to guide us. We started at the point near A, A-I, and we made zigzags onthe track, cutting back and forth and finishing up some weeks later ata point E-10, Ever: thing is nicely in order now. Figure 26 illustrates the way it eventuated' [Laughter] We started, we went along very well and were going pretty much on course, except that the problem of doing oceanographic work from a destroyer presents its own problems. When we first started out we asked the skipper, in this case, of the Walton to let us go 50 miles this way and then stop. “Stop? I don't