Radar (acronym for Radio Detection and Ranging) uses radio waves to detect objects in the environment. It allows determining the distance (known as range), angular position (bearing), and velocity.

Emerging radar and signal processing technology is enabling Navy surface ships to achieve a ground-breaking measure of radar-detection range and precision--all while enabling ship defense systems to ...

Traditional sonar and radar use an echo-based approach, and have been amazingly successful in sensing and tracking vehicles and objects under water, through the air, or even in space. The principle is ...