What is sonar?

What is sonar?

• A. Submerged Navigation and Reconnaissance
• B. Sound Orientation and Range
• C. Sound Navigation and Ranging used to detect and track contacts
• D. Sonar uses radar to detect objects

Answer: (C)

Sonar uses sound waves in water to locate objects and determine their distance and, with the right data, their direction. The acronym stands for Sound Navigation and Ranging, and it covers both finding a contact and tracking its movement over time. In practice, sonar can be active—where you emit a sound pulse and listen for echoes to estimate range and bearing—or passive—where you listen for sounds already produced by others. This combination of using sound and providing a means to detect and follow contacts is what makes this option the best description. It also clarifies why other ideas like using radar (which relies on electromagnetic waves) aren’t accurate for underwater detection.

Sonar uses sound waves in water to locate objects and determine their distance and, with the right data, their direction. The acronym stands for Sound Navigation and Ranging, and it covers both finding a contact and tracking its movement over time. In practice, sonar can be active—where you emit a sound pulse and listen for echoes to estimate range and bearing—or passive—where you listen for sounds already produced by others. This combination of using sound and providing a means to detect and follow contacts is what makes this option the best description. It also clarifies why other ideas like using radar (which relies on electromagnetic waves) aren’t accurate for underwater detection.