Definition
AIRCRAFT CONFLICT
Predicted conflict, within EDST of two aircraft, or between aircraft and airspace. A Red alert is used for conflicts when the predicted minimum separation is 5 nautical miles or less. A Yellow alert is used when the predicted minimum separation is between 5 and approximately 12 nautical miles. A Blue alert is used for conflicts between an aircraft and predefined airspace.
- See: EN ROUTE DECISION SUPPORT TOOL
Source: FAA Pilot/Controller Glossary (verbatim from the Federal Aviation Regulations).