that the fallout program, if » wou e greatly reduced and that while some collection stations would protably be required, the program woud not be of such a nature as to warrant use of the YAGS and LST 611. Whether or not the flash blindness studies conducted during REDWING will be continued during HARDTACK is not known at this time, but it appears fairly certain the Program 6,1 will be continued. c. Raydist. Colonel Henry stated that use of the cubic system of aircraft vositioning had been disapproved by AFSWP and that MSQ probably would be used, It was then pointed out that if this system is used it will not be possible to tetally evacuate Bikini when test aircraft were participating, Colonel Massey stated that he felt a command decision on this matter would have to be reached before settling on the M5Q system, Colonel Eddy and Colonel Henry concurred and stated that even through Raydist was unsatisfactory in some respects, it might have to be used as alast resort, If the MSQ system is used, it is planned to place the control vans in revetments rather than to build a completely new control station, d. Helicopters, Colonel Henry was asked if AFSWP had any in- formation as to the maximm PSI which could be sustained by helicopters without damage. It was pointed out that we had used .5 PSI as a criterta during REDWING, Colonel Henry stated that he felt this was the uppermost limit which could be used, especially for the H~21's but that more knowledge would be available at a later date as a result of certain tests scheduled to be conducted during Operation PILGRIM, e. DOD Programs, Colonel Eddy stated that the only currently apvroved DOD shot was the very high altitude shot (9,000 ft.). The revised Navy program consisting of two shots, a deep water shot and a medium depth water shot, will be presented to the JCS for aprroval on 25 January. It was the feeling of the AFSWP representatives present that there was little chance cf getting the ultra high altitude shot into the HARDTACK program, Cost as well ss limited time remaining were considered as coverning faators, 5. Following the visit with the AFSWP representatives, the group made a brief call on Colonel Kesling in AFOAT, Colonel Kesling was asked if he had any definite knowledge as to the type of helicopter the Air Force would probably provide for Operation HARDTACK, Colonel Kesling replied that the H-19 helicopter is being phased out of the Air Force inventory and replaced with the H-21 type, He stated that a FEAF unit would probably be directed to provide helicopter support for Operation HARDTACK, and since this command is now being supplied with H-21's, we would undoubtedly have this type assigned during HARDTACK., Colonel Massey then rointed out that the H-21 was a mich larcer aircraft than is required to carry the average number of passengers normally transported per trip, and that this seemed to be unwise from an aircraft utilization point of view. Colonel Kesling agreed, but stated that since the H-21 would protably be the only tyre available, the Air Force h2s no alternative in the assignment, A AFWL/ HQ 5 © Tac! $2. 4 “~ r cA w