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Sonar was developed after WWI and used effectively in WWII to counter German U-boats. During the Cold War, improvements to sonar helped track quiet Soviet submarines. Navies invested in understanding underwater sound transmission to track deep-sea submarines. Active sonar detects objects by emitting pulses and listening for echoes, while passive sonar listens for emitted sounds. Both are used to locate underwater objects like ships, subs, and fish.

Author

joshigauta

Language

EN