Radio frequency change signs are used at airports for what purpose?

Radio frequency change signs are used at airports for what purpose?

• A. To indicate different ground control frequencies for different areas.
• B. To indicate runway exits
• C. To indicate hold short
• D. To indicate taxiway centerline lights

Answer: (A)

The signs exist because a busy airport is split into separate control areas, each with its own radio frequency. When you taxi from one area into another, you must switch to the frequency used by the controller responsible for that area so you can receive new instructions and confirm you’re correctly communicating. The sign tells you exactly which frequency to switch to at that point, helping maintain safe and coordinated ground operations. These signs aren’t about runway exits, hold-short instructions, or taxiway lighting—those functions are indicated by different signs or lights.

The signs exist because a busy airport is split into separate control areas, each with its own radio frequency. When you taxi from one area into another, you must switch to the frequency used by the controller responsible for that area so you can receive new instructions and confirm you’re correctly communicating. The sign tells you exactly which frequency to switch to at that point, helping maintain safe and coordinated ground operations. These signs aren’t about runway exits, hold-short instructions, or taxiway lighting—those functions are indicated by different signs or lights.