# data[].attributes.body
Sonar

Sonar is a technique that uses sound propagation to navigate, measure distances, communicate with or detect objects on or under the surface of the water, such as other vessels.

In short Sonar uses sound waves to 'see' in the water.

Sonar, short for Sound Navigation and Ranging, is helpful for exploring and mapping the ocean because sound waves travel farther in the water than do radar and light waves.

# data[].attributes.body
A SONAR works on the same principle as that of an echo. Echoes are produced when a sound wave is reflected back on hitting an obstacle in its path. The reflected sound wave will then travel back to the source.

# data[].attributes.body
How does a sonar device work?

Active sonar transducers emit an acoustic signal or pulse of sound into the water. If an object is in the path of the sound pulse, the sound bounces off the object and returns an “echo” to the sonar transducer. If the transducer is equipped with the ability to receive signals, it measures the strength of the signal.

# data[].attributes.body
Military uses sonar to spot enemy's underwater , fishermen use it so they don't get hit by any obstruction .

Animals use sonar to navigate and some of them use it to communicate
eg: bat , whales and dolphins

# data[].attributes.attachment_link.authors[].name
Smithsonian's National Museum of Natural History

# data[].attributes.attachment_link.title
Skin & Bones - Big Idea: Echolocation (new version)