he COMMUNICATIONSSECURITY a. Transmission security and radiotelephone procedure are covered in Appendix 2 to this Annex, 11 users of voice radio circuits are required to comply with procedures as outlined in Appendix 2, 2 Appendices 1. “HT Channelization 2. Communication Security OFFTCIAL: ” ra . cae “. a7 7 , ODSe. ve OM “4 RICHATD 3, RUCNT Lt Colonel, US.F Communication Officer APMLING HOWELL M. TSTES Brigadier General, U.S.iA.F, Commander