During overhaul operations, what is critical to ensure fire is fully extinguished?

During overhaul operations, visual inspection plays a critical role in ensuring that a fire is fully extinguished. This process involves carefully examining the area, looking for any signs of hidden fire, such as smoldering materials or smoke, which may indicate that the fire is still active. By closely analyzing the affected structure and materials, firefighters can identify potential hotspots that may reignite if not addressed adequately.

In contrast, while thermal imaging can be highly useful for detecting heat signatures and identifying hot spots that may not be visible to the naked eye, it is the visual assessment that allows firefighters to determine the condition and integrity of the surroundings as well as confirm complete extinguishment. Water application is important for putting out visible flames and cool down hot spots, but its effectiveness relies on thorough inspections as well. Gas detection can be essential for identifying hazardous gases, but it does not directly assist in confirming that the fire is fully out. Therefore, comprehensive visual inspections are essential during overhaul operations to ensure that there are no remaining hazards or potential fire risks.