G. AIRCRAFT LOCATION FOR POSITIONING Another oft-studied problem during the pre-operational days of CASTLE concerned the selection of a device that would pinpoint the exact geographical location of the effects aircraft at burst time within extremely close tolerances. This informetion was needed to correlate the effects data with the yield of the shot. Task Group 7.1 had recommended that SHORAN be placed on several islands to obtain the fix, but General Estes felt that the information gained from SHORAN would not completely justify the expense of installation. In a letter to General William H. Blanchard, Headquarters, SAC, on 21 October, General Estes recommended thet this problem be studied at a conference to be held at SAC Headquarters some time between 2 and 14 November. This conference was to be attended by highly qualified SHORAN people, a qualified SHORAN operator, a man skilled in ground station positioning and maintenance, and radar and photo interpretation personnel, The conference was held at SAC Headquarters on 1l November and was attended by General Estes; Colonel Kesling; Colonel Ray M. Hawley, Director of Materiel, TG 7.4; Colonel Fackler; Lt Colonel Crosby and Mr. Martin Oberg, Western Electric Field Engineer. The R-17 and 0-15 cameras were considered too inaccurate for this project end the MPQ was believed too delicate to withstand the shot jar. It was found that SHORAN could be made availeble by SAC and would be reasonably accurate, although not necessarily as accurate as Task Unit 13 might desire. SHORAN was described es being reliable cnly when two complete stations were available at each location, ard provided the survey of ground stations was of the second order. _ a i, s¥