Which of the following is considered a mandatory reporting point for pilots?

The correct choice highlights that VOR stations and waypoints are recognized as mandatory reporting points for pilots. This is because VOR (VHF Omnidirectional Range) stations provide critical navigation assistance, enabling pilots to navigate and maintain situational awareness. In controlled airspace, pilots are often required to report their position relative to these navigational aids, ensuring effective communication and coordination with air traffic control.

Waypoints, which are predefined geographic locations determined by latitude and longitude, serve a similar purpose, often used in conjunction with modern navigation systems. Reporting at these points aids in maintaining structured flight paths and contributes to overall air traffic safety. As such, pilots are trained to utilize VOR stations and waypoints effectively for navigation and communication, making them standard reference points in aviation operations.

The other options do not represent mandatory reporting requirements. While major airports may have reporting protocols, they are not the sole focus for communication in all situations. The notion of reporting "during descent only" restricts reporting to just one phase of flight. Additionally, the idea that any location the pilot desires can be reported contradicts established procedures, as reporting points are standardized for safety and efficiency in aviation.