‘ Sauer a - — Ill 137 element was placed under the control of the Test Services Unit largely because of its RB-50 maintenance compatibility with that of the aircraft of the Weather Reconnaissance Klement. The Documentary Photography Element provided photographic equipment and technical personnel for accomplishing the documentary photography mission for HARDTACK,. The Communications «lement was responsible for the operation of the communications-electronic and Air Traffic Control facilities in sujport of HARDTACK. The facilities included navigational aids, ground communications, weather Central communications, and Weather Island and special facilities, _Eniwetok was a tributary relay station in the Global Comnunications System. Tnis multiple service was a counterpart of tne United states Army Signal Corps and was a joint endeavor, with both the Air Force and Army furnishing personel to operate the Joint Tape kKelay Center, the Joint High Frequency Transmitter site, and the Joint High Frequency Receiver vite, The Communications Hlement operated the Task Group 7.4 Communica- Lions Center wnich consisted of a full duplex to the Joint Tape hnelay Center, nalf duplex straignt patch to the avajalein hajor nelay Center, half duplex to rvarry Weather Central, fuil uuplex to Tasa« Group 7.5 Communications Center, and fuil duplex to the USS doxer, tm el . Ars AFWL/ HQ