SAR is used when

• A. a rescuer needs to egress to a safe area in the event of a problem with the primary air supply
• B. good option in an enclosed space rescue
• C. not appropriate for confined spaces
• D. limited to surface rescues

Answer: (A)

The main idea is having a backup breathing air source to get a rescuer out safely if the primary air supply fails. A supplied-air respirator (SAR) gives breathing air from an external source so the wearer can move to a safe area without running out of air, making it ideal for emergency egress in hazardous environments. This backup air allows the rescuer to leave the area quickly and safely, rather than being trapped by a failing main supply. The notion that it’s only for surface rescues or that it’s not suitable for confined spaces isn’t accurate, since SAR is specifically intended to support safe exit from hazardous spaces, including confined ones.