What role does a PASS device play for SCBA users?

A PASS device, or Personal Alert Safety System, is essential for the safety of SCBA users who may be operating in hazardous environments. Its primary function is to alert others if the user becomes motionless for a predetermined amount of time. This is particularly important in firefighting and rescue scenarios, where a firefighter may become incapacitated or disoriented due to smoke, heat, or other dangerous conditions.

The activation of the alarm serves as a critical safety measure, notifying team members to provide immediate assistance, which can be life-saving. The functionality of PASS devices enhances teamwork and communication among responders, ensuring that everyone is aware of each other's status and can react swiftly in emergencies.

Other options in this question refer to functions that are not associated with the PASS device. Monitoring air quality and tracking location are responsibilities typically handled by other specialized devices or systems. Indicating the remaining air supply is a function of the SCBA’s pressure gauge, which provides critical information to the user regarding their air availability but does not relate to the PASS device’s motion-sensing capabilities.