Which frequency is used for communication regarding GC South Tower?

The frequency used for communication regarding GC South Tower is 118.05 MHz. This frequency is standard for ground control operations at many airports, including O'Hare, and is assigned specifically for coordinating aircraft movements on the ground and within the control zone near the airport. Using the correct frequency ensures clear communication between pilots and ground control personnel, which is vital for maintaining safety and efficiency on the airport grounds.

The other frequencies listed have different purposes: 121.90 MHz is typically used for Clearance Delivery, while 124.125 MHz may be designated for approach or tower operations at different airports. 121.75 MHz is designated for emergency communications. Understanding and using the correct frequency not only aids in effective communication but also prevents misunderstandings that could lead to safety hazards on the airport property.