The NAV master mode is primarily used for which functions?

• A. It covers flight data only
• B. Flight data, steering, navigation, landing, and advisory information
• C. It displays weather information
• D. It handles engine health monitoring

Answer: (B)

NAV master mode focuses on navigation-related display and guidance control. It drives how flight data is shown in the context of navigation, and it provides the steering cues, route guidance, and approach/landing assistance that the navigation system delivers. It also handles advisory messages from the nav system, such as guidance alerts and flight-management cues that help you follow a flight plan, track waypoints, and execute approaches. Weather information is managed by the weather radar subsystem, and engine health monitoring is handled by engine/airframe health systems, not NAV master mode. So this mode is best described as covering flight data, steering, navigation, landing guidance, and nav-related advisories.