What technology assists in the navigation of terrain contour matching systems?

The correct answer identifies radar technology as a key component in terrain contour matching systems used in navigation. Terrain contour matching, or TERCOM, employs radar systems to compare the height and shape of the ground terrain against a preloaded digital map. This operational methodology enables aircraft to identify their position relative to the Earth's surface by utilizing the data collected by the radar.

Radar is capable of providing real-time information about the contour of the ground below, which is crucial for accurate navigation, especially in environments where traditional visual cues may be lacking. In scenarios like low-level flying or adverse weather conditions, radar technology becomes essential for ensuring that the aircraft remains on its intended flight path while avoiding obstacles.

Visual tracking systems, while useful for certain types of navigation and situational awareness, do not operate in the same manner as radar technology and generally rely on visual references rather than the in-depth terrain mapping that radar provides. Infrared detection is primarily utilized for target identification and tracking, focusing on detecting heat signatures rather than mapping terrain contours. Laser targeting, while effective for precision targeting scenarios, does not play a significant role in contour matching for navigation purposes.

Thus, the use of radar technology is vital for the operation of terrain contour matching systems, making it the appropriate choice in this context.