OPERATIONS ORDER NO, 2-54 ewege ee ee ee ey COMMUNICATIONS HEADQUARTERS TASK GROUP 7.4, PROVISIONAL APO 187, c/o Postmaster - San Francisco, California 26 February 1954, 1800 M en ee ee ee ee tye we em am 1, GENERAL CONCEPT OF COMMUNICATIONS OPERATIONS: - a. One permanent relay - crypto center at ENIWETOK will ‘be in~ “stalled, operated and maintained by Task Group 7,2, Tributary stations serviced by this relay center will include Headquarters Task Group 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 oe SAMSON (synchronous mixer): . (1) ENTWETOK-OAHU _(UHP): - . (2) : (3) one full ‘duplex radio teletype | ghannel (Provided by TG 7.2). ENTWETOK-KWAJALEIN: One. full duplex multiplex channel (Provided by TG 7. Aye ENIWETOK-BIKINI: ‘One full duplex radio teletype channel SO (Provided by TG7. 2). (4) ENIWETOK-LOS’ ALAMOS: One full copter‘radio teletype on channel (Provided by TG 742) 6 at ~ (5) " RIIMETOK-Acc_(USS ESTES); One fullduplex multiplex * \ehannel (Provided by TG 7.4). . , - traffic not capable of being handled by means of on-line + Paotitites” will be enciphered off-line prior to transmission, “All TOP . SECRET and RESTRICTED DATA traffic will be enciphered off-line, This is . necessary to meet AEC requirements and, in additim, terminal commnica- ; tions® parsonnel are not in all instances TO. SECRET’ or "QUEBEC" cleared, . at “On ENIWETOK and BIKINI ATOLLS,:wire telephona facilities “cleared tor“conversations up to and. Ancluding. SECRET will be made avail- “able to the Task Group by “the Soint, ‘Task Force. oN . de Voice radio facilities will be available on,a < closelycon— oa &— basis between the following pointe: a) ENIWETOK-BIKINI (HF) vO 7 : (2) | ENIVEDOK-HUATALEIN-BIKINI (HF) (TG.Th controled) ” (3) Between, ships“(oH vEF, “AN/TRE and ®) (4) ‘Ship, - shore (ur, “sN/sne aniHF) : pee 5 - " (5) AOC ENIWETOK-CIC“Comimand Ship_oVE-Gontrol DDE-ENIWETOK. Pia 20 as ‘FighterControl DDE(TG. Toh.controlled) - a dadenSa nctleseatin? hemteaemntee os Neale oe ee ea ale led an OP le ote eScaa omeot