= Uclossitied DOD DIR $200.18 Declassified at DOD DIR 5200.10 as listed in the Radio Facility Charts, Pacific. (4) In addition to the facilities referred to in subparagraph (3) above, the following aids to aerial navigation will be installed, maintained and operated: (a) Two (2).channels of UHP in the ENIWETOK control tower. (b) Ground Control Approach (AN/CPN-4) on ENIWETOK ISLAND with HF, VHF, and UHF communications facil- ities, (ce) Control]tower with two (2) channels of VHF on BIKINI. (5) (d) Low frequency radio beacon on BIKINI, (e) AN/CPN-6 radar beacons on ENIWETOK and BIKINI ATOLLS. Install, maintain and operate following landline tele- type facilities: (a) One (1) duplex terminal in the message center of Headquarters, TG 7.4 (to JTF Joint Relay Center). (6) (b) One (1) simplex terminal in the AOC, ENIWETOK (to JTF Joint Relay Center). (c) One (1) simplex terminal in the weather central (to the Task Force Weather officer, PARRY ISLAND). (d) One (1) duplex terminal in the AACS Communications Center (to JTF Joint Relay Center), 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 by the Test Services Unit will be performed by that unit. iI (8) (9) Perform organizational maintenance of airborne equipment and augment the Test Support Unit for field maintenance of airborne equipment, Furnish necessary air_traffic control personnel for a limited approach contro] facility in the OK aoc. (10) . Assigned aircraft will have normal communitations-electronics equipment installed. All aircraft will be . equipped with the AN/aPX-6 transponder, In addition, the SA-16' have a modified AN/APX-6 interrogator operat- ing in conjunction with the 4. in Fader. GENERAL: a. Construction, rehabilitation, installation and service checking of comminications facilities in support of Operation CaSTLE (RESTRICTED, SI) TASK GROUP 7.4 OPES ORDER NO. 1-53 ANNEX D » Declassified DOD DIR 5200.10