Which specific piece of equipment must be worn with structural firefighting PPE and SCBA?

Wearing a Personal Alert Safety System (PASS) device is crucial when using structural firefighting personal protective equipment (PPE) along with a self-contained breathing apparatus (SCBA). The PASS device is designed to provide an added layer of safety for firefighters. It continuously monitors the motion of the wearer, and if the firefighter becomes immobile for a set period, the system emits a loud alarm to alert others of their potential danger. This feature is particularly essential in the hazardous environments encountered during structural firefighting, where conditions can rapidly change, and visibility can be compromised.

In contrast, the other devices mentioned, while beneficial in certain scenarios, do not serve as mandatory equipment in conjunction with structural firefighting PPE and SCBA. The IACOM communicator is a tool for communication but is not a requirement, just as the AGPS tracking system and IEEA reflecting metal are specialized tools that may enhance operational efficiency or safety but are not universally mandated for every structure fire response. The PASS device, however, directly addresses the critical need for safety and accountability in emergency situations.