Which emergency item is meant for protecting crew members from smoke or fire on the CRJ700?

PBE, or Protective Breathing Equipment, is specifically designed to protect crew members from smoke and fire hazards during emergencies aboard an aircraft. This equipment typically includes a face mask and a self-contained source of breathable air, which allows crew members to navigate hazards and perform necessary safety procedures without being affected by smoke inhalation or toxic fumes.

The PBE is critical in firefighting situations, as it enables the crew to maintain their visibility and respiratory safety while they manage the emergency. Its intended use is to provide immediate protection against the dangerous effects of smoke, heat, and toxic gases typically found in a fire scenario within the aircraft.

In contrast, an infant life vest is designed specifically for ensuring the safety of infants during a water evacuation, Halon 1211 is a fire-extinguishing agent used to suppress fires, and an LED flashlight serves primarily as a light source to assist in various situations such as locating exits or equipment. While all these items are important in their respective contexts, they do not specifically protect against smoke and fire in the same way that PBE is designed to do.