(a) _ (bo) (6) One (1) duplex terminal in AACS message center to JTF Joint Relay Center. One (1) simplex terminal in the weather central ENIWETOK to the Task Force Weather Offic.r, PARRY ISLAND. Install, maintain and operate necessary AN/TRC back-up for keying and modulation wire lines on ENIWETOK ISLAND, (7) Complete maintenance of all ground equipment operated (8) Perform organizatio:nad maintenance of airborne equipment and augment the Test “upport Unit for field maintenance of airborne equipment. (9) Furnish necessary air traffic control personnel for an approach control facility in the ENIWETOK AOC, (10) Assigned aircraft will have normal communications-elec- ' * by the Test Services Unit will be performed by that unit. tronics equipment installed, All aircraft will be equipped with the AN/APX=6 transponder. In addition, the SA-16's will have a modified AN/APX-6 interrogator operating in conjuction with the installed radar, 4. GENERAL: ' a, Signal Officer, TG 7.2,will operate a crystal grinding facility to provide emergency production of crystals for all elements of the Task Force. However, every effort will be made to procure reqiired crystals through established supply channels prior to commencement of tho operational phase. b. Communications operating instructions (COI's) published by c. Task Unit Commanders are resporisible for the suppression of Headquarters, Joint Task Force SEVEN, will include a list of approved radio and wire circuits, call signs and frequencies, and uniform task force communications operating procedure. electrical interference being generated by equipment of their task units, and will take necessary action to reduce such noises to a point of none interference with authorized communications ferilities, d. See Appendix 1 for complete listing of communications cir~ cuits and navigational aids available to all elements of Task Group 7.44,. together with frequencies assigned, hours of operation and other pertinm t information. e. A list of frequencies authorized for use by all elements of Joint Task Force SEVEN may be found in Communications Operation In- structions (COI) Number 20-1. £. See Appendix 2 for call signs, code words and identifiers g. See Appendix 4 for HF and VHF Aircraft Channelizaticn, authorized for use by all elements of Task Group 7.4. TASK GROUP 7.4 OPRS ORDER NO, 2-54 AYNEY ten ae -