General Authority of Civil Aviation (GACA) Aeronautical Information Publication (AIP) Practice Exam

What does the ADIRU primarily provide?

1. Navigation data

2. Pitch and roll data

3. Air data for speed, altitude, attitude, and inertial navigation

4. Weather data

The correct answer is: Air data for speed, altitude, attitude, and inertial navigation

The ADIRU, or Air Data Inertial Reference Unit, is a crucial component in modern aircraft systems. Its primary function is to provide comprehensive air data, which includes critical information such as speed, altitude, and attitude, as well as data for inertial navigation. This is essential for the safe operation of the aircraft, as it allows the pilots and onboard systems to determine the aircraft's precise position, flight path, and performance metrics. This role is central to the overall avionics of the aircraft, as the information from the ADIRU enhances situational awareness and contributes to effective navigation and control. The data it produces supports various systems within the aircraft, including autopilot, flight management systems, and display units in the cockpit, all of which rely on accurate inputs for safe operation. While navigation data, pitch and roll data, and weather data are all important aspects of flight management, they do not encompass the full range of data provided by the ADIRU. The combination of air data and inertial information is what makes the ADIRU a key player in maintaining flight safety and operational efficiency.