Wierd. We just call it "air one". I didn't even know they had more than one. Do they call it something different when talking to ATC?Theres really only two news helicopters. Call signs are Sky5 and Air4. If you hear Metro1 or Metro2 those are the police helicopters. Sky5 does a direct microwave downlink with the station and Air4 only goes live on occasion. They mainly talk to the Nashville tower 118.6. They also talk on the other channel mention, mainly to keep from running into each other.