What frequency is typically used for outbound communication with GDC?

The frequency typically used for outbound communication with GDC (Ground Data Communications) at O’Hare Airport is 130.750. This frequency is designated for surface communications at busy airports, enabling effective coordination among ground vehicles, including buses and other support equipment, to ensure safe and efficient operations.

Understanding the importance of this frequency helps in maintaining communication with ground control, reducing potential misunderstandings that could lead to safety issues on the tarmac. The frequencies like 135.40, 121.75, and 119.25 are reserved for other specific purposes, such as approach and departure communications or emergency situations, and are not the standard for outbound GDC communication. Knowing which frequency to use is crucial for smooth ground operations at the airport.