Which statement describes action when ATIS code/message changes?

• A. Broadcast on a single frequency
• B. Broadcast on all frequencies in use
• C. Broadcast on all appropriate frequencies
• D. Do not notify pilots

Answer: (C)

When ATIS information changes, the updated data must be broadcast on all frequencies that carry ATIS for that area. This ensures every pilot who might be listening on any of the relevant channels—whether the official ATIS frequency itself or other services that disseminate ATIS data—receives the new information promptly and consistently. Using more than one frequency is necessary because pilots could be tuned to different channels, and a single-frequency broadcast might miss those on other frequencies. Broadcasting on all frequencies in use could include channels that aren’t intended for ATIS dissemination and could cause confusion. Notifying pilots at once is essential for safe and coordinated operations, so this is the correct approach.