wa: Projects 6.2a and 6.2b were successful in obtaining significant data concerning blast, thermal and gust effects on B-3%6 and B-47 aircraft in flight. Minor blast damage was sustained by the B-36 on several shots; however, predictions on temperature rise as a function of incident thermal energy for both the B-% and B-47 were shown to be conservative. Some concern arose over the response of the B-36 horizontal stabilizer to gust-loading at a critical station. Addition- al studies will be required, including instrument calibration, before any revisions of current concepts of delivery capabilities can be expected. Project 6.4 was successful in evaluating the effectiveness of washdown systems for naval vessels. Also much valuable experience wag gained in ship decontamination procedures and techniques. In naval vessel, when adequately equipped with Washdown apparatus, can operate safely in regions of heavy fall-out ang still maintain opera- tional capability without excessive exposure of the ship's company to residual radiation from fall-out. Project 6.5, operating in conjunction with Project 6.4, evaluated current decontamination procedures on representative walls, roofing, and paving surfaces which were subjected to the wet contaminant of barge and land shots. The contaminant, particularly from the barge shots, was found to be much more tenacious than that experienced in Similar tests at the Buster-Jangle underground shot, and the accepted decontamination procedures less effective. Project 6.6, recordings of effects on fonospheric layers, parti- cularly the F, layer, were successful in most instances. Because of rediation levéls, the Rongerik station could not be operated continuously for complete fonosphere history, but the station was activated for all shots. The significance of recorded results will require detailed study prior to the writing of a final report. 2.3.6 Program 7, Long Range Detection The general objectives of Program 7 experiments in this test 8eries were the improvement of present techniques, development of new techniques, and collection of calibration data in furtherance of the AFOAT-1 mission, Participation in the test was really two-fold, con- sisting of some experiments specifically designed for Operation Castle and some operational tests of routine procedures, Cople * HOty, 42 ror ry addition, one vessel (YAG 39) assisted in the collecting of fall-out data for Project 2.5a. Project 6.4 has demonstrated that a typical