Sona (an anglè SONAR, akwonim de Sound navigation and ranging) se yon aparèy ki itilize onn sonò pou detekte ak mezire objè ki anba dlo.[1]
![Thumb](http://upload.wikimedia.org/wikipedia/commons/thumb/3/38/Motte-Picquet-tugged-sonar.jpg/640px-Motte-Picquet-tugged-sonar.jpg)
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