What is the ICAO code for Cincinnati VORTAC?

The ICAO code for the Cincinnati VORTAC is indeed CVG. This code is derived from the airport's name, which is Cincinnati/Northern Kentucky International Airport. The "CVG" code is well-recognized and used internationally to identify this location in aviation contexts, including flight planning and air traffic control communications.

The other options provided do not correspond to the Cincinnati VORTAC. CNC and CIG are not registered ICAO codes for this location or for any significant navigation aid related to Cincinnati. The ICAO code CNV is also not accurate; it might be mistakenly associated with a different waypoint or airfield, but it does not reflect Cincinnati or its VORTAC infrastructure. Therefore, the correct use of CVG represents the establishment of a clear, standardized communication protocol in aviation, ensuring that pilots and air traffic controllers can efficiently identify the Cincinnati VORTAC.