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SONAR (SOund Navigation And Ranging) — or sonar — (in British use ASDIC until 1948) is a technique that uses sound propagation under water to navigate or to detect other vessels. There are two kinds of sonar — active and passive. Sonar is a subcategory of acoustic location.

History


In 1906, Lewis Nixon invented the very first passive sonar-type listening device, as a way of detecting icebergs *. During World War I, with the need to detect submarines, interest in sonar increased. The French physicist Paul Langevin, working with a Russian emigré electrical engineer, Constantin Chilowski, invented the first active sonar-type device for detecting submarines in 1915. Although piezoelectric transducers later superseded the electrostatic transducers they used, their work influenced the future of sonar designs. In 1916, under the British Board of Inventions and Research, Canadian physicist Robert Boyle took on the project, which subsequently passed to the Anti- (or Allied) Submarine Detection Investigation Committee, producing a prototype for testing in mid-1917, hence the British acronym ASDIC.

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Development - Subsea surveys and solutions for real-time process control and visualisation down to 4000 metres. We also provide transducer products. We are based in the UK and operate globally.
Meta Description: [ SRD : Advanced Acoustic Systems for the offshore industry. ]

S Marine Ltd - Design, development and supply of underwater acoustic sensors, data networks and electro-mechanical based technologies, systems and through-life support to the defence and commercial offshore markets.
Meta Description: [ J & S Marine is a leading, independent, UK -based company with a long pedigree engaged in the design, development, manufacture and support of complex systems and equipment associated with the naval defence and commercial offshore oil and gas markets. ]

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Meta Description: [ World leaders in Vibration Test Equipment and Underwater Acoustic Systems, Gearing & Watson vibration test equipment and underwater acoustic systems can be found operating in more than 30 countries around the world. ]

Advansys Solutions Ltd - Design and develop software for sonar used in navel combat systems.
Meta Description: [ Advansys Solutions, High Level Strategic Studies in Sonar. Aerospace and Defense, Systems Engineering, Emergency Services. ]

AquaCoustic Remote Technologies Inc - Providing remote-sensing services for your underwater needs, using SONAR systems and proprietary software programs.
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Meta Description: [ Klaxon manufacturers electronic sounders, fire alarms, sirens, beacons, bells, buzzers and hooters for Fire, Industrial and Security applications. Klaxon also offers directional sounder evacuation solutions. ]

Klein Associates - Manufacturer of side scan sonar systems, navigation and intrusion detection.

L-3 Communications ELAC Nautik GmbH - Manufacture echosounders and sonars, underwater communication systems, multibeam systems, transducers and hydrophones.
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404 Lockheed Martin -Syracuse - Prime contractor for many sonar systems.
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