sonar
名词
UK/ˈsəʊ.nɑːʳ/
US/ˈsoʊ.nɑːr/
定义 sonar 名词
- Uncountable
A system or device that uses sound waves to detect objects underwater, determine water depth, or for navigation.
The navy uses sonar to track submarines.
Fishing boats are equipped with sonar to locate schools of fish.
Scientists use sonar to map the ocean floor.