Qualla: SOSUS https://qualla.com/sosus en-us © 2026 Bendyline Wed, 08 Jul 2026 02:40:13 GMT Qualla serial false Qualla support@bendyline.com yes https://qualla.com/_m/g/c/h/r/sosus-wp/hero-small.webp Qualla: SOSUS https://qualla.com/sosus SOSUS: Introduction https://qualla.com/sosus/ Photo credit USN, Public domain. On July 6, 1962, a Soviet nuclear submarine slipped into the North Atlantic through the Greenland-Iceland-United Kingdom gap, expecting to disappear into deep water like every Soviet boat before it. It did not disappear. Hydrophones on the sea floor caught the low-frequency thrum of its reactor coolant pumps, sent the signal up a cable, and within minutes a watchstander at Naval Facility Barbados had identified the contact, classified it, and reported it. The Soviets did not know it yet, but the ocean had grown ears. The system was called SOSUS, and for forty years its existence was one of the deepest secrets in the United States Navy.

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]]> Sun, 24 May 2026 00:00:00 GMT https://qualla.com/_m/g/c/h/r/sosus-wp/gchr-sosus-intro.mp3 0:06 1 full SOSUS: A Bell Labs Problem https://qualla.com/sosus/ Photo credit USN, Public domain. The work that became SOSUS started in 1949, when the US Navy asked the National Academy of Sciences how to counter a Soviet diesel submarine fleet that was growing faster than the US could build escorts. The resulting Project Hartwell study, led from MIT, recommended a passive li...

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]]> Sun, 24 May 2026 00:00:00 GMT https://qualla.com/_m/g/c/h/r/sosus-wp/gchr-sosus-a-bell-labs-problem.mp3 0:06 2 full SOSUS: Cables and Triangles https://qualla.com/sosus/ Photo credit USN, Public domain. The first experimental array, six hydrophones, was laid off Eleuthera in the Bahamas in 1951. A year later a full forty-element array was installed nearby, and tests against a target submarine were so successful that the order for stations was promptly increased. By 1957, a strin...

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]]> Sun, 24 May 2026 00:00:00 GMT https://qualla.com/_m/g/c/h/r/sosus-wp/gchr-sosus-cables-and-triangles.mp3 0:06 3 full SOSUS: The Watch Floors https://qualla.com/sosus/ Photo credit USN, Public domain. Inside each Naval Facility, ranks of LOFARgram writers printed continuous strip charts on electrostatic paper, smearing acoustic energy across a frequency-versus-time grid. Trained watchstanders, given the cover title of Ocean Technician, scanned these grids for the faint lines t...

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]]> Sun, 24 May 2026 00:00:00 GMT https://qualla.com/_m/g/c/h/r/sosus-wp/gchr-sosus-the-watch-floors.mp3 0:06 4 full SOSUS: Brawdy and the GIUK Gap https://qualla.com/sosus/ Photo credit USN, Public domain. By the 1970s the network had grown beyond its original Atlantic basin. The Iceland-UK gap was the gateway through which any Soviet submarine had to pass to reach the open Atlantic, and watching it required a forward station closer than the American east coast. NAVFAC Keflavik ope...

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]]> Sun, 24 May 2026 00:00:00 GMT https://qualla.com/_m/g/c/h/r/sosus-wp/gchr-sosus-brawdy-and-the-giuk-gap.mp3 0:06 5 full SOSUS: Coming Up for Air https://qualla.com/sosus/ Photo credit USN, Public domain. In 1985 the system was renamed the Integrated Undersea Surveillance System, IUSS, reflecting the addition of the mobile SURTASS towed arrays on T-AGOS ships. The fixed bottom arrays kept listening, but the network was no longer just a chain of cables. In 1991 the mission was fina...

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]]> Sun, 24 May 2026 00:00:00 GMT https://qualla.com/_m/g/c/h/r/sosus-wp/gchr-sosus-coming-up-for-air.mp3 0:06 6 full