What feature allows the chief controller in the C-Box to manage the surveillance of aircraft?

The feature that enables the chief controller in the C-Box to manage the surveillance of aircraft is barometric settings. Barometric settings are crucial in aviation as they involve the calibration of altitude readings based on atmospheric pressure. This ensures accurate altitude measurements, which are essential for maintaining safe separation between aircraft and for ensuring effective communication between air traffic control and pilots.

With correct barometric settings, controllers can track the vertical positioning of aircraft accurately, allowing for better decision-making and management of air traffic in controlled airspace. Proper altitude information is vital for identifying conflicts and for issuing commands to ensure safe operations.

While display modes, switching mechanisms, and signal optimization may play roles in downlinking data or enhancing communication, they do not directly contribute to the fundamental airborne surveillance capabilities that rely on precise altitude information provided by barometric settings.