What is the purpose of the Helmet Mounted Display Unit (HDU)?

• A. It projects symbology onto the visor and can route video to the cockpit video recording system
• B. It feeds data to the flight control computer
• C. It provides oxygen supply to the user
• D. It cushions the head during impact

Answer: (A)

The key idea is that the Helmet Mounted Display Unit provides information directly to the pilot by projecting symbology onto the visor. This lets the pilot see essential flight and targeting data without looking down at the cockpit instruments, and the display can move with the pilot’s head to keep cues on screen as the pilot looks around. It’s also capable of routing video to the cockpit video recording system, which is useful for training and post-mission debriefs.

Such a function isn’t about feeding data to the flight control computer, which comes from other avionics and sensors; it’s not about supplying oxygen or providing head protection—that’s handled by other subsystems. So, projecting visor symbology and routing video to the cockpit recording system is exactly what the Helmet Mounted Display Unit is for.