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  2. Sonar - Wikipedia

    en.wikipedia.org/wiki/Sonar

    Sonar (sound navigation and ranging or sonic navigation and ranging) [2] is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances , communicate with or detect objects on or under the surface of the water, such as other vessels.

  3. SOSUS - Wikipedia

    en.wikipedia.org/wiki/SOSUS

    Sound Surveillance System (SOSUS) was the original name for a submarine detection system based on passive sonar developed by the United States Navy to track Soviet submarines. The system's true nature was classified with the name and acronym SOSUS classified as well.

  4. Underwater acoustic communication - Wikipedia

    en.wikipedia.org/wiki/Underwater_acoustic...

    At the beginning of the 20th century some ships communicated by underwater bells as well as using the system for navigation. Submarine signals were at the time competitive with the primitive maritime radionavigation. [2] The later Fessenden oscillator allowed communication with submarines.

  5. Underwater acoustics - Wikipedia

    en.wikipedia.org/wiki/Underwater_acoustics

    Output of a computer model of underwater acoustic propagation in a simplified ocean environment. A seafloor map produced by multibeam sonar. Underwater acoustics (also known as hydroacoustics) is the study of the propagation of sound in water and the interaction of the mechanical waves that constitute sound with the water, its contents and its boundaries.

  6. History of submarines - Wikipedia

    en.wikipedia.org/wiki/History_of_submarines

    The history of the submarine goes ... A possible propulsion system for submarines is the ... Early experiments with the use of sound to 'echo locate' underwater in ...

  7. Long baseline acoustic positioning system - Wikipedia

    en.wikipedia.org/wiki/Long_Baseline_Acoustic...

    The search and inspection of the lost nuclear submarine USS Thresher by the U.S. Navy oceanographic vessel USNS Mizar in 1963 is frequently credited as the origin of modern underwater acoustic navigation systems. [7] Mizar primarily used a short baseline (SBL) system to track the bathyscaphe Trieste 1. However, its capability also included ...

  8. Communication with submarines - Wikipedia

    en.wikipedia.org/wiki/Communication_with_submarines

    Communication with submarines is a field within military communications that presents technical challenges and requires specialized technology. Because radio waves do not travel well through good electrical conductors like salt water, submerged submarines are cut off from radio communication with their command authorities at ordinary radio frequencies.

  9. Project Artemis - Wikipedia

    en.wikipedia.org/wiki/Project_ARTEMIS

    A test array was laid in the Bahamas off Eleuthera and upon successful tests with a U.S. submarine an order for six such systems was issued in 1952. The Sound Surveillance System (SOSUS), its name and purpose classified, was given the unclassified name Project Caesar to cover its development and maintenance.