e, Internal Task Group communications and navigational aids will be furnished from existing AACS facilities augmented as necessary to fulfil oporational requirements, Control of task force aircraft will be centered aboard the Command Ship (AGC) utilizing radar and radio facilities to be furnished by TG 7.3. An Air Operations Center (A0C) on ENIWETOK ISIAND will be responsible for air traffic control and for the naintcnance of a plotted picture of the air situation, Airborne communications and electronic aids for aircraft control will consist of the usual installed electronics equipment, together with Mark 10 IFF transponders ond interrogators and low frequency radio homing beacons as necessary. 2. MISSION, HEADQUARTERS TASK GROUP 7,4: a. Prepare communications annexes to operations order as re- quired and supervise the installation, operation, maintenance and utiliza~ tion of Task Group 7,4 communications and electronic facilities, b, ; Establish and supervise a transmission security training pro- gram for all intended users of voice radio facilities and a message drafter improvement program to insure most efficient use of limited operational communications facilities, 3. (See Appendix 3) COMMUNICATIONS TASKS FOR SUBORDINATE UNITS: a. Test Support Unit: (1) Provide and operate organizational and field maintenance for communications and electronics equipment installed in assigned aircraft, (2) Provide and operate a task group radio-radar field maintenance shop for electronic equipment, This shop will be augmented by qualified personnel from the Test Aircraft Unit and the Test Services Unit. (3) Provide and naintain necessary inter-communications and public address systems, (4) Install, maintain and operate the AN/TTQ-1 Operations Center equipment in the AOC on ENIWETOK ISLAND, (5) Provide, install and maintain mobile line, crash, security and maintenance control radio equipment, (6) Prepare task group telephone directory stencils, in for~ mat to be designated by the consolidating and issuing . agency. (7) (8) (Sec JTF SEVEN COI 40-1) Install, maintain and operate a modified Mark 10 interro- gator with associated scopes in the AOC, ENIVETOK ISLAND, Install and mdntain necessary radio aml associated equipment for the control of liaison aircraft and heli- copter operations on ENIWETOK ATOLL, (9) Maintain a crystal bank for all task group operational (10) A Communicatims Officer assigned to the Test Support frequencies, Unit will be responsible to the Senior Aircraft Controller for the supervision of all communications and electronic facilities in the AOC, ENIWETOK ISLAND, TASK GROUP 7.4 OPRS ORDER NO, 2-54 ANNEX "BE" E-2