APPENDIX TO ANNEX OPERATIONS ORDER_NO. 1-54 COMMUNICATIONS COMMUNICATIONS 1, GENERAL: ' The purpose of this appendix is to set forth the mission, functions, responsibilities, and organization of the communications security program. 2, GUIDING PRINCIPLES: a. All low, medium and high frequency radio circuits are subject to constant intercept from fixed land positions or possibly from ships, aircraft or submarines. In the same manner and under favorable atmospheric conditions, VHF transmissions are susceptible to possible monitoring. b. No radio circuit or telephone circuit having a radio link is approved for transmission of classified information in the clear. ce. All TOP SECRET and RESTRICTED DATA traffic will be enciphered offline prior to transmission. d,. Code names will not be assigned to individuals, personal riames on voice radio circuits is authorized. The use of e. All messages for transmission to addressees outside the BIKINI-ENIWETOK Operational Area will be routed through the Joint Relay Center, ENIWETOK, except: (1) (2) (3) (4) (5) Traffic between Commander, TG 7.4 and the Weather Island Detachments. . Unclassified traffic (i.e., weather, aircraft movement) . between AACS, KWAJALEIN and AACS Detachment, ENIWETOK. Intra~Task Group operational traffic. Emergency traffic which cannot be delivered to the Joint Relay Center because of circuit failure. Other traffic as directed by Commander, JTF SEVEN, f. Radioteletype facilities will be used in lieu of voice radio whenever practicable for communications security reasons. g. COI's (Communications Operating Instructions) are published h. No cover or deception plan is to be employed except for decep- i. No requirements for radio silence are imposed on Task Group and issued by JIF SEVEN for the technical control and coordination of communication agencies throughout the Task Force. COI's are directive in nature, tion offered by the rehearsals and for such traffic security as is provided by the use of SIGTOT-SAMPSON equipment on RATT circuits. TASK GROUP 7.4 OPRS ORDER NO. 1-54 ANNEX E, APNDX 3 E3-1