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Beached Soviet Sub Sparks National Panic
- A fisherman in 1981 discovered a Soviet submarine beached near Swedish shores, triggering national alarm.
- The navy boarded, found nuclear weapons, and returned the sub to international waters amid Cold War fear.
Secret 'Typical Sound' Defined Military Response
- Sweden expanded underwater listening networks using hydrophones after repeated submarine scares.
- The military labeled a recurring sound as the "typical sound" identifying assumed Soviet subs for years.
Scientists Hear The Classified Recording
- In 1996 scientists were finally allowed to hear the classified "typical sound" at a top-secret naval briefing.
- Magnus and colleagues were surprised because the recording sounded like distant, airy pops—not submarine pings.