Which component is essential for the operation of a Local Airport Advisory?

The correct component essential for the operation of a Local Airport Advisory is automated weather reporting with voice broadcasting. This system is crucial because it provides real-time weather information to pilots, especially at airports that may not have a control tower. Local Airport Advisories are intended to enhance safety and situational awareness for pilots, and accurate, timely weather data is a key part of that mission.

Automated weather reporting gives pilots up-to-date information on conditions such as wind speed, visibility, and any weather phenomena that could affect their operations. The voice broadcasting feature ensures that this information is readily accessible and can be communicated effectively to pilots in the air or on the ground, allowing them to make informed decisions regarding their flights.

In contrast, visual light signals, ground-to-ground radar systems, and flight plan filing systems, while relevant to aviation operations, do not serve the specific purpose of providing necessary weather updates that Local Airport Advisories depend upon for their effective functioning.