Which frequency is designated for outbound ground communication?

The frequency designated for outbound ground communication at O'Hare Airport is 121.75. This frequency is commonly used by pilots to communicate with ground control as they prepare for taxi and takeoff. For outbound flights, this frequency provides a direct line for pilots to inform ground personnel of their intentions and receive instructions related to their departure.

Understanding the significance of 121.75 helps in ensuring effective communication during critical phases of flight operations, particularly in a busy airport environment like O’Hare. Clarity in ground communications is essential for safety, helping to coordinate aircraft movements and avoid potential conflicts on the ground.

The other frequencies listed are used for different purposes, such as traffic advisories, approach control, or other operational communications, making them unsuitable for specific outbound ground communication settings.