what is SONAR? write two uses of Sonar technique.
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Sonar is a technique that uses sound propagation to navigate, communicate with or detect objects on or under the surface of the water, such as other vessels
Military. The primary purpose of military sonar is to detect and attack other ships. Surface ships, aircraft and submarines all use sonar (and other sensors) to conduct ASW (Anti-Submarine Warfare). Submarines also use sonar (and other sensors) to conduct ASuW (Anti-Surface Ship Warfare). Other uses of sonar include communications (the US Navy calls it an Underwater Telephone, NATO allies call it Gertrude), navigation (fathometers, under-ice, etc), sound velocity measurements and mine detection and classification.
Active sonar. The term SONAR means SOund NAvigation and Ranging. It’s predecessor was the British ASDIC (Allied Submarine Detection Investigation Committee) system developed towards the end of WWI to detect submerged U-Boats. It works by transmitting a “ping” (a short pulse of sound) and receiving an echo. If you know the sound velocity (roughly 4600–5100 feet per second in seawater) and measure the time between transmission and echo, you can calculate the distance to the target (the range). If you know the direction (bearing) the echo came from, you have the target’s relative location from the sonar system.
Military. The primary purpose of military sonar is to detect and attack other ships. Surface ships, aircraft and submarines all use sonar (and other sensors) to conduct ASW (Anti-Submarine Warfare). Submarines also use sonar (and other sensors) to conduct ASuW (Anti-Surface Ship Warfare). Other uses of sonar include communications (the US Navy calls it an Underwater Telephone, NATO allies call it Gertrude), navigation (fathometers, under-ice, etc), sound velocity measurements and mine detection and classification.
Active sonar. The term SONAR means SOund NAvigation and Ranging. It’s predecessor was the British ASDIC (Allied Submarine Detection Investigation Committee) system developed towards the end of WWI to detect submerged U-Boats. It works by transmitting a “ping” (a short pulse of sound) and receiving an echo. If you know the sound velocity (roughly 4600–5100 feet per second in seawater) and measure the time between transmission and echo, you can calculate the distance to the target (the range). If you know the direction (bearing) the echo came from, you have the target’s relative location from the sonar system.
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Answer:
Sonar stands for sound navigation ranging.
Explanation:
Sonar is defined as a technique which is use to navigate or or detect communicate with the objects present under water surface such as oceans by using sound propagation.
Two uses of Sonar technique are as as following:
- It is use to locate underwater hazards to navigation and to develop nautical charts.
- It is use to determine water depth (bathymetry).
Learn more about Sonar:
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