©wwe__ussitied DOD DIR 5200.10 Declassified TO OPERATIONS ORDER NO. 1-53 COMMUNICATIONS DOD DIR 5200.10 HEADQUARTERS TASK GROUP 7.4, PROVISIONAL Kirtland Air Force Base, New Mexico 15 August 1953, 1800 T 1. GENERAL CONCEPT OF COMMUNICATIONS OPERATIONS: a. One permanent relay - crypto center at ENIWETOK will be in- ' stalled, operated and maintained by TG 7.2. Tributary stations serviced by this relay center will include Headquarters, TG 7.4, which will be responsible for distribution of messages to its subordinate units. For handling of teletype traffic, up to and including SECRET, between major forward and rear echelon Task Force elements the following radio teletype circuits will be operated "ON-LINE", using SIGTOT with SAMSON (synchronous mixer): (1) ENIWETOK-OAHU (UHP): One full duplex radio teletype channel ee (Provided by TG 7.2). (2) ENIWETOK-KWAJALEIN: (3) ENIWETOK-BIKINI: One full duplex radio teletype channel (Provided by TG 7.2). (4) ENIWETOK-LOS ALAMOS: (5) ENIWETOK-aGC {uss ESTES): (Provided by TG 7.4). Two full duplex mitiplex channels One full duplex radio teletype channel (Provided by TG 7.2). type channel One full duplex radio tele- (Provided by TG 7.2). (6) TG 7.4 traffic destined for the ZI will be routed over established USaF circuits from KWAJALEIN, vb. Traffic not capable of being handled by means of on-line facilities will be enciphered off-line prior to transmission. Al TOP SECRET and RESTRICTED DATA traffic will be enciphered off-line, This is necessary to meet AEC Requirements and, in addition, terminal commnica- tior: personnel are not in all instances TOP SECRET or "QUEBEC" cleared. c. On ENIWETOK and BIKINI ATOLLS, wire telephone facilities cleared for conversations up to and including SECRET will be made available to the Task Group by Joint Task Force, d. Voice radio facilities will be available on a closely con- trolled basis between the following points: (1) ENIWETOK-BIKINI (HF) (2) ENIWETOK-KWAJALEIN-BIKINI (HF) (TG 7.4 controlled) (3) Between ships (UHF, VHF, AN/TRC and HF) TASK GROUP 7.4 OPRS ORDER NO, 1-53 ANNEX D Declassified a) DOD DIR 5200.10 Decl OD Digat’ 200.19