on Channel "C" or BOUNDARY TARE on Channel "E", HF air-ground Circuit J~410 will be used as alternate. OFFICIAL: HOWELL M. ESTES, JR. bedU,Lib - Brigadier General, Commander Lt Colonel, USAF Director of Operations TASK GROUP 7.& OPRS ORDER NO. 2=54. _ anyrx J . J-2 U. 8. A. F.