Sonar Underwater Surveillance Technology

Sonar (sound navigation and ranging) is a system that uses transmitted and reflected underwater sound waves to detect and locate submerged objects or to measure distances underwater; it also serves many other purposes. The Sonar device sends out a subsurface sound wave then listens for returning echoes; the sound data is relayed to receivers or a receiving device. The first Sonar type listening device was invented in 1906 to aid in the detection of icebergs. Rising interest in Sonar became apparent during World War I to help with submarine detection. Most of the advances in Sonar technology took place during the Cold War and continue to this day. This paper will describe what Sonar is used for, several types of Sonar, how they work and how the technology has evolved over time, as well as some interesting and disturbing evidence on how the latest Sonar System (LFA) Sonar may disrupt marine mammals.
Sonar Technology has many different uses. For instance, this technology is ut...