Declasitied ~ pod ore §200.10 cae ease will be completed by 31 December 1953, b. Declassified DOD DIR 3200.10 Signal Officer, TG 7.2, will operate a crystal grinding facil- ity to provide emergency production of crystals for all elements of the Task Force. However, every effort will be made to procure all required -erystals through established supply channels prior tocommencement the operational . c. ” Communications operating instructions (COI's) published by 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, d. All aircraft with the exception of liaison type (L-13's) and helicopters will have the AN/APX-6 transponder installed. e. Task Unit Commanders are responsible for the suppression of electrical interference being generated by equipment of their Task Units, and will ‘take necessary action to reduce such noises to a point of non- interference with authorized communications facilities, HOWELL M. ESTES, JR, 5 Appendices (To be added later) 1. 2. Communications Circuits Frequencies 4. Communications Security 3, 5. Brigadier General, U.S.A.F. Commander Call Signs, Code Words Air-to-Air and Air-to-Ground Channelization OFFICIAL: (PBYsMes Lt Colonel, USAF Communications Officer , TASK GROUP 7.4 OPRS ORDER NO. 1-53 ANNEX D sean Declassified D6, DOD bik 5200.19