The master mode primarily used for flight data, steering, navigation, landing, and advisory information is the NAV mode.

• A. LCOS
• B. NAV
• C. A/G
• D. A/A

Answer: (B)

NAV mode uses the aircraft’s navigation data to guide the aircraft along the planned route. It taps into GPS and radio nav sources (like VOR/LOC or GPS), computes the required bank and heading to stay on course, intercepts and tracks navigation courses to waypoints, and guides approaches for landing. It also presents advisory information such as distance to go and current course, helping you understand where you’re heading and what to expect next. This combination—flight data, steering, navigation, and the ability to guide an approach—makes NAV mode the best fit for the described tasks. Modes focused on air-to-ground or air-to-air activities serve different purposes, and a local control option doesn’t provide the full navigation guidance needed for following a flight plan or conducting an instrument approach.