Which technology is primarily used to track both friendly and potentially threatening objects?

Radar is primarily used to track both friendly and potentially threatening objects. This technology operates by emitting radio waves that reflect off objects, allowing the system to determine the distance, speed, and direction of those objects. Radar is widely utilized in various applications, including air traffic control, weather monitoring, and military surveillance, due to its ability to provide real-time information about the location and movement of objects in the air and on the ground.

In contrast, ultrasound is typically used for medical imaging or detecting objects under water but is less effective over longer distances and for tracking moving objects in air or ground environments. Lidar, which uses laser light to map surfaces, is particularly effective for high-resolution measurements and is often used in autonomous vehicles and topographical mapping, but it is less suited for tracking objects over long distances compared to radar. Sonar, on the other hand, is used primarily in underwater environments to detect objects such as submarines or obstacles but does not operate effectively above water. Each of these technologies has its specific uses, but for tracking both friendly and potentially threatening objects in the broader context, radar is the most versatile and widely used option.