It's one of the most controversial new pieces of electronics: omnidirectional sonar.
Remote Sensing, Free Full-Text
Sonar, Definition, Acronym, Uses, & Facts
Chinese Navy Sonar Blasts Aussie Sailors; Fallout Threatens Australia's Pro-China Government
The vinyl frontier: why do we keep sending music to outer space?, Pop and rock
Sonar Wars: Lowrance StructureScan 3D, Raymarine SonarChart Live & GoFree Hooked (BLOG) - PassageMaker
Barra sonar buoy Australian War Memorial
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Captain Sonar, Board Game
petition: Stop Sonar Testing and Killing Dolphins and Whales Now!
Sonar in the Sea Services Naval History Magazine - April 2020, Volume 34, Number 2
Low-Frequency Active (LFA)
Have you made the move to Live Scope technology
Most submarines use sonar to track other vessels - The Economic Times
Side-scan sonar - Wikipedia
EP57, Flying through the air on a sub, Bob Bailey Sonar Tech First Class, Submarine Sea Stories
Report on sonar
