Communications CJTF SEVEN No. 1-53 (4) Ship-shore buoy cable at ENIWETOK, PARRY and BIKINI. (5) AN/TRC radio, limited to unclassified traffic, will be used as a backup for the foregoing facilities. t @e Voice radio facilities will be available on a closely controlled basis between the following points: (1) ENIWETOK-BIKINI (HF) (2) ENIWETOK-KWAJALEIN (TG 7.4 controlled) (HF) (3) ENYU (Firing Party) - USS ESTES (VHF) (4) Between Ships (UHF, VHF, AN/TRC and HF) (5) Ship-Shore (VHF, AN/TRC and HF) Long-haul and inter-atoll voice radio and radioteletype facilities will be limited to those authorized by CJTF SEVEN. Mission, Headquarters, JTF SEVEN ao Prepare & communications and electronics plan for Operation CASTLE to include engineering of the overall joint task force communications ‘ be Assign and control all radio frequencies, call signs, address groups and routing indicators. ce Provide and maintain operational control of the communications d. Monitor communications training of subordinate task groups. eo Operate communications center and crypto facilities for Headquar- f. Control utilization of teleconferencing facilities. ge Prepare Headquarters, JTF SEVEN telephone directorye he Prepare and distribute COIs (Communications Operations Instruc- ie Provide for installation and maintenance of terminal VHF ciphony rg systems security monitoring unit. Prepare periodic reports for CJTF SEVEN concerning status of task force communications security. ters, JTF SEVEN, Washington 25, D.C. tions). facilities (ENYU-USS ESTES). je Provide for procurement and distribution of SIGTOT heads, onetime tape and SAMSON equipment required for on-line SIGTOT-SAMSON operationse ke Establish a transmission security training program for all intend‘ed users of voice radio facilities and a message drafter improvement program to insure most efficient use of limited operational L-2 ma 20