Two yellow lights indicate which air percentage on the SCBA head-up display?

Two yellow lights indicate which air percentage on the SCBA head-up display?

• A. 74-50%
• B. 49-36%
• C. 100-75%
• D. 35% and under

Answer: (B)

Reading the head-up display involves recognizing what the LED pattern says about how much air you have left. When two yellow lights appear, that pattern is a warning that you’re in the lower portion of your air supply. It’s a clear signal to start planning for safe egress or switching to a backup air source, and to moderate effort to conserve air. It’s not yet the most urgent danger level, but it’s a definite cue to begin exit planning and communicate your status with your team. Other ranges are signaled by different patterns or colors (full or high air usually shown by greener indicators, with more urgent warnings as air becomes critically low).

Reading the head-up display involves recognizing what the LED pattern says about how much air you have left. When two yellow lights appear, that pattern is a warning that you’re in the lower portion of your air supply. It’s a clear signal to start planning for safe egress or switching to a backup air source, and to moderate effort to conserve air. It’s not yet the most urgent danger level, but it’s a definite cue to begin exit planning and communicate your status with your team. Other ranges are signaled by different patterns or colors (full or high air usually shown by greener indicators, with more urgent warnings as air becomes critically low).