Which HUD indicator shows PASS is in pre-alarm?

Which HUD indicator shows PASS is in pre-alarm?

• A. Red flashing triangle on the HUD indicates PASS is in pre-alarm.
• B. Full red indicates PASS is in pre-alarm.
• C. Flash blue indicates PASS is in pre-alarm.
• D. Solid green indicates PASS is in pre-alarm.

Answer: (A)

The helmet HUD uses distinct visual cues to show PASS status, and the red flashing triangle is the early warning signal for pre-alarm. This pattern is designed to grab attention quickly in smoky or low-visibility conditions, giving you a chance to move, check your status, or reset the PASS before the full alarm sounds. The other indicators correspond to different states—full red signals alarm, blue flashing is another alert state, and solid green typically means normal/ready—so the red flashing triangle specifically points to pre-alarm.

The helmet HUD uses distinct visual cues to show PASS status, and the red flashing triangle is the early warning signal for pre-alarm. This pattern is designed to grab attention quickly in smoky or low-visibility conditions, giving you a chance to move, check your status, or reset the PASS before the full alarm sounds. The other indicators correspond to different states—full red signals alarm, blue flashing is another alert state, and solid green typically means normal/ready—so the red flashing triangle specifically points to pre-alarm.