What is the purpose of ATIS at an airport?

The purpose of ATIS, or Automatic Terminal Information Service, at an airport is to continuously broadcast essential information to arriving and departing pilots. ATIS provides updated and relevant data such as runway conditions, weather reports, available services, and any pertinent notices regarding air traffic or operations at the airport. This service helps ensure that pilots receive timely, accurate information without needing to contact air traffic control directly, which can help reduce radio congestion and enhance operational efficiency.

The term "Automatic" in ATIS signifies that the information is pre-recorded and automatically played on a loop, allowing pilots to receive the latest updates even before they arrive at the airport or while they are taxiing. This service is crucial for maintaining situational awareness in busy terminal environments, ensuring the safety and efficiency of air traffic operations.

The other options presented do not accurately describe ATIS. For instance, while "Airport Traffic Information System" might seem related, it does not correspond to the established terminology used in aviation. Similarly, "Air Traffic Incident Service" and "Automated Terminal Information Service" are incorrect designations, as they do not reflect the commonly accepted term or function of this service.