CHARLOTTE, N.C. Collins Aerospace has been tapped by the U.S. Air Force (USAF) to develop a modern Common VLF Receiver Increment 2 (CVRi2) communications protocol for the future Survivable Airborne Operations Center (SAOC), a small fleet of aircraft that are being built and equipped for the highest level of government to direct military forces, deliver emergency war orders, and coordinate civil authorities in the case of destruction of ground command-and-control centers.