Aeronautical Information Service (AIS) — Page 353, Lesson 472

Let's start with the big picture. The Aeronautical Information Service — we call it the AIS — is the State's official system for gathering, handling, and publishing aeronautical information. I want you to understand why it exists before we get into the details. The core objective is this: the safety, regularity, and efficiency of international air navigation depend on an organized, efficient flow of information. Think about what a scheduled flight needs before it even starts. The pilots and the operator need to know the availability of aerodromes, the navigation facilities, and the ATS routes — that's Air Traffic Services routes. Without that, you can't plan a flight. Air Traffic Controllers need the same information, but they also need information from pilots to ensure safety. So the AIS is the system that makes sure all of that information is provided, handled, and disseminated — that's the publication side — and it's the responsibility of the Aeronautical Information Service of the State. Now, here's something important. This has always been necessary, but the role and importance of aeronautical information and data has changed significantly. Why? Because of area navigation — RNAV — and required navigation performance — RNP — and airborne computer-based navigation systems. These systems depend on precise data. If that data is corrupt or erroneous, it can potentially affect the safety of air navigation. That's a direct cause-and-effect statement: bad data, unsafe navigation. Let me give you a concrete example from the text. Precision RNAV approach systems use GLS — that's GPS based landing systems. The success of that system depends on precise information being available at all times. So the AIS isn't just about publishing a chart; it's about maintaining the integrity of the data that modern navigation depends on. Now, the regulatory foundation. The ICAO document that contains the Standards and Recommended Practices for the provision of the AIS is Annex 15 to the Convention on Civil Aviation. That's the document that contains the material relevant to your learning objectives. So when you study AIS, you're studying Annex 15. Finally, let's look at the functions — what each State is required to do. Each Contracting State must provide an aeronautical information service. But there are two alternatives. A State can agree with one or more other Contracting States to provide a joint service. Or a State can delegate the authority for the service to a non-governmental agency. So three options: provide it yourself, share it jointly, or delegate it. That's the foundation of the AIS. We'll build on this as we go through the chapter.