Air defense warning yellow--attack by hostile aircraft and/or missiles is probable. This means that hostile aircraft and/or missiles are en route toward an air defense division/sector, or unknown aircraft and/or missiles suspected to be hostile are en route toward or are within an air defense division/sector.
Air defense warning red--attack by hostile aircraft and/or missiles is imminent or is in progress. This means that hostile aircraft and/or missiles are within an air defense division/sector or are in the immediate vicinity of an air defense division/sector with high probability of entering the division/sector.
Air defense warning white--attack by hostile aircraft and/or missiles is improbable. May be called either before or after air defense warning yellow or red.
The initial declaration of air defense emergency will automatically establish a condition of air defense warning other than white for purposes of security control of air traffic.
