A Head-Up Display (HUD) allows the pilot to view flight instruments and other data while looking through the windshield for which items?

• A. Engine indicators
• B. Altitude
• C. Weather radar
• D. Other traffic, the approach lights, or the runway

Answer: (D)

A Head-Up Display is designed to project essential flight data and certain external cues onto the pilot’s forward view, so you can keep looking through the windshield without losing track of what’s outside. This is most useful for gathering external references during approach and landing, such as other traffic, the approach lights, and the runway itself. Those external cues help you maintain situational awareness and precise alignment with the landing environment while your eye remains on the outside world.

Engine indicators and altitude are instrument readings, not external scene references you’d typically monitor through the windshield. Weather radar can be shown on some HUDs, but the question focuses on items you’d directly observe in the forward field of view as you scan the outside environment.