After how many seconds does the PASS start sounding, and after how many seconds does it reach full alarm?

After how many seconds does the PASS start sounding, and after how many seconds does it reach full alarm?

• A. 20 seconds, growing in intensity until full alarm at 30 seconds
• B. 10 seconds, full alarm at 25 seconds
• C. 15 seconds, full alarm at 20 seconds
• D. 30 seconds, full alarm at 60 seconds

Answer: (A)

PASS devices alert teammates when a firefighter stops moving by using a staged audible alarm. After twenty seconds of inactivity, the device begins to sound, and the alarm increases in intensity until it reaches full alarm by thirty seconds. This ten-second ramp provides a clear, escalating signal that helps rescuers locate the firefighter quickly without waiting too long. Other timings would either trigger alarms too soon or too late, making response less effective. If movement resumes or the device is reset, the alarm stops and the timer restarts.

PASS devices alert teammates when a firefighter stops moving by using a staged audible alarm. After twenty seconds of inactivity, the device begins to sound, and the alarm increases in intensity until it reaches full alarm by thirty seconds. This ten-second ramp provides a clear, escalating signal that helps rescuers locate the firefighter quickly without waiting too long. Other timings would either trigger alarms too soon or too late, making response less effective. If movement resumes or the device is reset, the alarm stops and the timer restarts.