Name one common technique for improving visibility in smoky environments.

Using thermal imaging cameras is a vital technique for improving visibility in smoky environments. These devices detect heat patterns and convert them into a visual format, allowing firefighters to see through smoke and identify hotspots, people, or structural features that may be obscured. In an environment filled with smoke, traditional visibility methods are greatly hindered, making thermal imaging an invaluable tool for situational awareness and ensuring the safety of both firefighters and victims.

While the other techniques listed may seem beneficial in different scenarios, they do not specifically address the challenge of visibility in smoke as effectively as thermal imaging cameras do. For example, smoke bombs would likely exacerbate the visibility problem rather than improve it. Flashlights, while helpful in visibility under certain conditions, may not penetrate dense smoke effectively. Switching off power sources does not aid in improving visibility but is a safety measure to prevent electrical hazards in a fire situation.