+ ew : airborno transponders in the period Be3 to Bel, During this opera- tion all assignod oircraft had operating transponders. However, the transponders in one VIKING aircraft and one HARDTIME aircraft, not considered as assigned aircraft, wore not operational. This equip- ment had been inspectcd prior to mission and it was belicved that the possibility of operator crror could account for this failure. This equipment was not available for inspection subsequent to tho shote The Raydist transmitters in ELAINE 1 and 2 wore inspected on B-1 and found to be oporating properly. Lhe plate moter in the 3.47 transmitter was found to be defective, but this did not impair - operation in any manner as tuning could be accamplished with other instruments. -~ : Tho condition was reported and Hastings personnel were 7m to furnish a roplacament, Prior to tho mission it was necossary to discard the storage battorics that had furnishod tho primary power sourco for tho Raydist gound stations. This was beccuse of unanticipated drain, The bat- terics wero replaced with geaolino driven auxiliary power units and this change was comploted by B~3 days when Hastings porsonnel boardad the USS Curtiss for oper-tion of the recording stction, Mectings had been held, prior to movement of the operations to the Pacific Proving Ground, which involved the methods and criteria used for positioning aircraft, tho organization resjgunsible for the safe positioning of airercft was the WADC, which had subcontracted the technical portion to ALlicd Research associates and UCLA, ce. «at the a (9