RNAV typically provides what kind of data to the Flight Management System?

• A. Attitude and navigation data
• B. Engine performance data
• C. Weather data
• D. Ground speed only

Answer: (A)

RNAV feeds the Flight Management System with the aircraft’s navigation state, including position, course, and speed estimates derived from satellite or other navigation signals. The FMS uses that data to build and update the flight plan, manage lateral and vertical navigation, and generate autopilot guidance. Attitude information from the aircraft’s attitude reference system is also used by the FMS to support accurate navigation calculations and performance assessments, so together they form the data set the FMS relies on. Engine performance and weather data come from separate systems, and ground speed alone would not provide the full navigation picture the FMS needs.