sonar

Also known as Sound Navigation And Ranging, Sound Navigation and Ranging, ASDIC, echo sounding

thumb|upright=1.35|French Georges Leygues-class frigate|F70 type frigates (here, ) are fitted with [[variable depth sonar (VDS) type DUBV43 or DUBV43C towed sonars.]] thumb|upright=1.35|A sonar image of the Soviet Navy minesweeper T-297, formerly the Latvian Virsaitis, which was shipwrecked in December 1941 in the [[Gulf of Finland.]]

AI overview

Sonar is a technology that uses sound waves to detect and locate objects underwater, as demonstrated by systems like those installed on military frigates and used to create images of shipwrecks on the ocean floor. It matters because it enables vessels and navies to identify submarines, mines, and other underwater objects that would otherwise be invisible to human sight.

AI-generated from the Wikipedia summary — may contain errors.

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Image: Sonar Principle EN.svg

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Commons category: Sonar

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~63 min read

Article

63 sections

Contents

History
ASDIC
SONAR
US Navy Underwater Sound Laboratory
Materials and designs in the US and Japan
Later developments in transducers
Active sonar
Project Artemis
Transponder
Performance prediction
Hand-held sonar for use by a diver
Upward looking sonar
Passive sonar
Identifying sound sources
Noise limitations
Performance prediction
Performance factors
Sound propagation
Scattering
Target characteristics
Countermeasures
Military applications
Anti-submarine warfare
Torpedoes
Mines
Mine countermeasures
Submarine navigation
Aircraft
Underwater communications
Ocean surveillance
Underwater security
Hand-held sonar
Intercept sonar
Civilian applications
Fisheries
Echo sounding
Net location
ROV and UUV
Vehicle location
Prosthesis for the visually impaired
Scientific applications
Biomass estimation
Wave measurement
Water velocity measurement
Bottom type assessment
Bathymetric mapping
Sonar imaging
Sub-bottom profiling
Gas leak detection from the seabed
Synthetic aperture sonar
Parametric sonar
Sonar in extraterrestrial contexts
Ecological impact
Effect on marine mammals
Effect on fish
Frequencies and resolutions
See also
Explanatory notes
Citations
General bibliography
Fisheries acoustics references
Further reading
External links

Sonar (sound navigation and ranging or sonic navigation and ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances (ranging), communicate with or detect objects on or under the surface of the water, such as other vessels.