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SONAR uses or applications | Uses of SONAR

This page covers applications or uses of SONAR. The SONAR term stands for SOund Navigation And Ranging. SONAR uses include under water research, locating sub-marines, medical field, detecting small objects etc.

What is SONAR?

• It is a system used for under water study.
• SONAR technology is similar to radar, ultrasound and seismics technologies.
• There are two main types of SONAR viz. passive sonar and active sonar as shown in the figure-1. Passive SONAR relies on acoustic noise waves radiated by under water targets for its operation.
• Active Sonar transmits acoustic signal which propagates towards target (or reflector) and gets reflected. This reflected waves travel back towards SONAR receiver. The reflected echo is being used by radar for its operation.

Active SONAR vs Passive SONAR

There are other SONAR types which include hand-held sonar and intercept sonar based on application usage.

Uses of SONAR | Applications of SONAR

➨It is used for estimation of range and direction of arrival of objects such as vessels or submarines. It basically functions as depth finder also.
➨It is used for communication between sub-merged submarines or between a submarine and a surface vessel.
➨It is used for locating mines and underwater hazards in order to achieve safe navigation.
➨It is widely used by commercial fishermen for fish finding.
➨It is used for seafloor mapping and seafloor imaging.
➨SONAR concept is being applied to medical imaging. Here high frequency sound waves are subjected on body and echos are recorded to create image called sonogram.


Advantages and disadvantages of SONAR
Difference between SONAR and RADAR
Difference between Active SONAR and Passive SONAR

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