Which instrument shows the airplane's attitude relative to the horizon?

• A. AHRS
• B. AD
• C. Air Speed Indicator
• D. Attitude Indicator

Answer: (D)

The Attitude Indicator shows the airplane’s orientation relative to the horizon. It presents a fixed miniature airplane against a horizon bar that tilts and moves as the aircraft banks and pitches. The visual relationship between the horizon line and the miniature airplane tells you exactly how you’re pitched up or down and how you’re rolled left or right. The horizon-based readout is what pilots rely on to judge attitude, especially when outside visibility is limited.

The other options don’t fit as the primary horizon reference: the AHRS is a sensor system that provides attitude data to modern displays rather than the direct horizon instrument itself; the Air Speed Indicator shows speed, not orientation; the Attitude Director Indicator can add flight-director cues but still isn’t the basic horizon-based attitude readout by itself.