What must be done in the event of a mismatch between ERAM and Non ERAM facilities?

In the event of a mismatch between ERAM (En Route Automation Modernization) and non-ERAM facilities, verifying the target position with the transferring controller is the appropriate action. This ensures that the information being communicated and acted upon is accurate and aligned across systems.

When there is a mismatch, it indicates a potential misunderstanding or miscommunication regarding aircraft positions or intentions. By confirming the target position with the controller responsible for the aircraft, you can clarify any discrepancies and ensure that the correct data is used for air traffic management. This step is crucial for maintaining safety and efficiency in the airspace, preventing potential conflicts or incidents that could arise from incorrect information.

Other options, such as notifying the nearest airport or reporting to surveillance authorities, do not directly address the immediate need to clarify and verify the data discrepancy. Ignoring the discrepancy would likely lead to increased risks and operational issues, making it vital to take proactive steps to reconcile the information.