What does a flat track position symbol represent?

The flat track position symbol indicates uncorrelated flight data, which means that the data being received does not match up with other flight data sources or is not aligned with expected flight paths. This can occur due to various reasons, such as a failure in the onboard equipment, issues with radar coverage, or simply a miscommunication of the aircraft’s position.

Identifying an aircraft’s uncorrelated flight data is crucial for air traffic controllers as it helps them understand that additional verification might be needed to confirm the aircraft's location and flight status. This allows controllers to take appropriate actions to ensure the safety and efficiency of air traffic operations.