Doppler sonar

Doppler sonar is a technology that uses sound waves to measure the speed and direction of moving objects underwater, such as fish or submarines. It operates on the principle of the Doppler effect, which states that the frequency of sound waves changes when the source is moving relative to an observer. By analyzing these frequency changes, Doppler sonar can determine how fast something is moving and in which direction. This technology is widely used in marine biology, navigation, and military applications to provide valuable information about underwater environments and moving targets.