What method can be used to reduce visibility to potential threats during Terrain Flight Operations?

Flying below the height of surrounding terrain is an effective method to reduce visibility to potential threats during Terrain Flight Operations. This technique, often referred to as "terrain masking," takes advantage of the natural landscape to conceal the aircraft from enemy observation or detection. By flying at lower altitudes and using the contours of the terrain—such as hills, valleys, and other features—the aircraft can remain out of sight and minimize exposure to hostile forces or surveillance systems.

This approach not only helps avoid being detected but also can enhance the pilot's ability to navigate through complex environments where obstacles may be present. Maintaining awareness of the terrain is crucial, as it allows for effective use of natural features to stay hidden while completing the mission objectives.