What action is required every 30 days regarding VOR stations?

The requirement to test VOR (VHF Omnidirectional Range) stations for accuracy every 30 days is essential for ensuring that pilots receive reliable navigation signals. This testing process involves checking that the VOR is functioning correctly and providing accurate directional guidance. The 30-day interval is specified in regulations to help maintain safety in aviation by ensuring that navigation aids are dependable and that pilots can trust the information presented by these systems during flight.

Conducting these checks ensures that any potential discrepancies or errors in the VOR signal are identified and addressed promptly, which is crucial for maintaining flight safety, especially during instrument flight operations where reliance on navigational aids is paramount. The maintenance of these systems is vital as they play a key role in instrument approaches and navigational accuracy for IFR (Instrument Flight Rules) operations.

While recording the checks, updating frequency information, or notifying ATC of changes may be necessary operational practices, they are not dictated by the same regulatory requirements as the accuracy testing of the VOR itself.