An Overview of SONAR:
The SONAR full form is Sound navigation and Ranging, it is a technique that locates or maps items in the surroundings using sound waves. The basic idea is simple. First, send a group of sound waves towards the target object. Some waves will bounce off of it, but the majority of them will be reflected toward the emitter. You would undoubtedly resemble a loop if you stuck one end of a tube into a large sea and put your ear to the other. However, you would also pick up on distant ship groans and the singing of diverse animals in the deep water.
SONAR can be used outside, but it is generally thought to work better underwater. This is because sound waves in water often travel farther. Whales can detect the shape and motion of things the size of ping-pong balls from 50 feet away thanks to the incredible range of sonar. They are believed to rely even more on sonar than on sight to hunt and find their relatives.
What is Active and Passive SONAR:
Sonar machines with much better range and resolution were eventually created by humans. The simplest of them consists of our voice box and hearing working together. When we yell at the top of our lungs and eventually hear the echo, we are using sonar on top of mountains and in valleys. However, the military’s LFA Sound navigation and Ranging produces sound waves that can reach thousands of miles. By generating sound waves from just four locations, we can reach about 805 of the oceans on Earth thanks to its broad range.
The SONAR full form is Sound navigation and Ranging, Despite the vastly better velocity of light and for that matter RADAR, Sonar is the tool that NOAA uses to create nautical charts, map the seafloor, find shipwrecks and forecast underwater risks.