II 76 been adapted to the B36 aircraft system, Considerable delay was ex perlenced during the modification periods and when the aircraft was ree turned from the modification contractor the E-l systems on the aircraft were lacking some components and had not been checked out. Despite sev~ eral attempts by the crews at Kirtland Air Force Base to flight check the systems, to successful check was completed by the time the aircraft departed for the proving ground in March 1958, Therefore, the crews arrived at Eni- wetok with little training or experience with their primary positioning radars; the El; radars did not produce satisfactory results; no established B.36 aircraft positioning mathods were capable of development prior to” the first proving ground rehearsals; more rehearsals than originally planned were necessary for adequate positioning; and, alternate optical and "eye- ball" wethods had to be developed to overcome the E-l deficiency, ‘Two E-l; technical representatives were secured from the Zone of Interior in an attempt to rectify the circumstance; however, this belated effort did not result in satisfactory operation in time for YUCCA D-day, The tvo 3-36 aircraft departed from Kirtland har Force Base on and arrived in the proving ground on 11 March, HARDTACK participation was begun immediately, March, Planning and training for ‘xcept for the malfunction- ing of the E-] systems, the aircraft and the crews were adequately prepared for the operational phase of the test series, AFWL/ HQ aa an wo

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