What does the term "overhaul" refer to in firefighting operations?

The term "overhaul" in firefighting operations specifically refers to the inspection for hidden flames after the main fire has been extinguished. This step is crucial because it involves thoroughly checking the fire scene for any remaining hot spots or embers that could reignite and pose a danger. Firefighters utilize various techniques such as thermal imaging cameras, probing with tools, or manually removing materials to ensure that the risk of re-ignition is minimized. This process is essential for ensuring complete safety and securing the area, as hidden flames can continue to smolder under debris or within structures.

The other options do not accurately capture the essence of the overhaul process. The extinguishing of the main fire is a separate phase of firefighting, while re-setting equipment and documenting incidents are important tasks but are not related to the specific function of overhaul.