Which alarm system is designed to signal that a firefighter is in distress?

The Personal Alert Safety System (PASS) is specifically designed to alert others when a firefighter is in distress. This system works by emitting a loud alarm when it detects that a firefighter has not moved for a certain period of time, indicating that they may be in trouble or incapacitated. The main purpose of PASS is to enhance the safety of firefighters by ensuring that if a firefighter becomes immobile or unconscious, their colleagues can be alerted quickly to provide necessary assistance.

The other options, while they may be related to safety and alarm systems, serve different purposes. For instance, the Emergency Alert System is primarily used for public emergency broadcasts rather than individual distress signals in firefighting scenarios. The Low Air Alarm serves as a warning that a firefighter's air supply is running low, but it does not specifically indicate distress. The Automatic Activation Alarm may refer to systems that automatically alert dispatch or command centers but does not directly target firefighter personal distress.