What safety equipment is essential for a fire engine crew during a structure fire?

The essential safety equipment for a fire engine crew during a structure fire includes items like fire hoses, nozzles, self-contained breathing apparatus (SCBA), and personal protective equipment (PPE).

Fire hoses are crucial for delivering water to extinguish the flames, while nozzles control the flow and direction of water. The SCBA is vital for providing breathable air in smoke-filled environments, thus ensuring the crew's safety while navigating hazardous conditions. Personal protective equipment, such as fire-resistant clothing, helmets, and gloves, provides additional protection from extreme heat, flames, and falling debris.

While other options mention various useful equipment, they do not encompass the core elements necessary for safely combating a structure fire. Life vests may be applicable in water-related emergencies, but they are not relevant in a structural firefighting context. Flashlights and radios are important for communication and visibility, yet they are supplementary to the primary firefighting tools. First aid kits and oxygen tanks serve specific medical needs but do not directly contribute to the firefighting efforts like the items listed in the correct answer.