Low air alarms on SCBA must have?

• A. GPS tracking
• B. Voice recording
• C. Audible and visual alerts
• D. Self-test on demand

Answer: (C)

Responding to a low-air condition must be prompt and unmistakable, so the alarm needs to be perceivable in the difficult conditions firefighters work in. An audible alert cuts through noise, allowing the wearer to hear that their air is dropping and to start exiting to safety. A visual alert adds a crucial redundancy, appearing as a flashing light or indicator on the mask or regulator so the warning is noticed even if sound is blocked by equipment, helmet orientation, or poor hearing in the environment. Together, audible and visual alerts ensure the message is received quickly and reliably, reducing the chance of missed warnings.

GPS tracking, voice recording, and self-test on demand don’t fulfill the immediate, perceivable warning role of a low-air alarm. They may be useful features in other systems, but they don’t provide the necessary, direct notification to the firefighter about dwindling air supply.