Which instrument on a Boeing 737 provides heading information?

Which instrument on a Boeing 737 provides heading information?

• A. Attitude Indicator
• B. DG
• C. HSI
• D. RMI

Answer: (B)

Heading information is provided by the Directional Gyro. This gyroscopic instrument maintains a stable reference to magnetic heading and displays the aircraft’s current heading. It serves as the primary heading reference in the cockpit, and other navigation displays (like the Horizontal Situation Indicator) use the DG as their source for heading data. The Attitude Indicator shows pitch and bank, not heading; the RMI provides bearings to VOR/ADF stations, not the aircraft’s own heading; and while the HSI can present heading information, it derives that from the DG.

Heading information is provided by the Directional Gyro. This gyroscopic instrument maintains a stable reference to magnetic heading and displays the aircraft’s current heading. It serves as the primary heading reference in the cockpit, and other navigation displays (like the Horizontal Situation Indicator) use the DG as their source for heading data. The Attitude Indicator shows pitch and bank, not heading; the RMI provides bearings to VOR/ADF stations, not the aircraft’s own heading; and while the HSI can present heading information, it derives that from the DG.