If a user is motionless for how many seconds, the pass device will sound its first alarm?

The first alarm of a personal alert safety system (PASS) device is designed to activate after a certain period of inactivity to alert others in case a firefighter is incapacitated or in distress. The correct timeframe for the first alarm to sound is 20 seconds of motionlessness. This feature is crucial for safety operations as it provides a window of time for a user to regain movement or for their colleagues to take action if they remain still. By setting the threshold at 20 seconds, the device balances the need to avoid false alarms due to momentary stillness while ensuring timely alerts in critical situations. There are specific incremental times built into these devices to enhance situational awareness in emergency response operations.