What does the HUD indicate when the SCBA cylinder is fully charged?

The HUD, or Heads-Up Display, is a critical component of the Self-Contained Breathing Apparatus (SCBA) used by firefighters. When the SCBA cylinder is fully charged, the system indicates this status by displaying a steady green light on the HUD. This visual cue allows firefighters to quickly and easily ascertain the readiness and full status of their air supply under low visibility conditions often encountered during firefighting operations.

A steady green light ensures that the firefighter can focus on the task at hand without the need for constant checking of the SCBA cylinder outside of their line of sight. This is particularly essential in emergency situations where time is of the essence, and visually discernible indicators provide immediate information about critical equipment status.