Sonar (originally an acronym for SOund Navigation And Ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, communicate with or detect objects on or under the surface of the water, such as other vessels. Sonar was used to find a crashed ship on Earth. ((SG1: "Descent") It was also used to find objects. (SGA: "Echoes")
External links[]
- Sonar on Wikipedia