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  2. AN/AQS-13 - Wikipedia

    en.wikipedia.org/wiki/AN/AQS-13

    AN/AQS-13 dipping sonar deployed from an SH-3 Sea King. The AN/AQS-13 series was a helicopter dipping sonar system for the United States Navy.These systems were deployed as the primary inner zone anti-submarine warfare (ASW) sensor on aircraft carrier based helicopters for over five decades. [1]

  3. HELRAS - Wikipedia

    en.wikipedia.org/wiki/HELRAS

    HELRAS or the Helicopter Long Range Active Sonar is a naval helicopter undersea sensor, a dipping sonar (a form of towed array sonar), deployed by helicopters of many naval air forces around the world to detect submarines; it is a form of geophysical MASINT.

  4. Thales Underwater Systems - Wikipedia

    en.wikipedia.org/wiki/Thales_Underwater_Systems

    The French entity, Thomson Sintra, brought in by Thomson-CSF, was the European leader in defence-related sonar systems and the world's second after Lockheed Martin Loral, with annual sales of 1.5 billion francs, split between submarine sonars (35%), anti-submarine warfare systems (27%), airborne sonars (18%) and mine warfare (15%).

  5. Sonar - Wikipedia

    en.wikipedia.org/wiki/Sonar

    AN/AQS-13 dipping sonar deployed from an H-3 Sea King. Helicopters can be used for antisubmarine warfare by deploying fields of active-passive sonobuoys or can operate dipping sonar, such as the AQS-13. Fixed wing aircraft can also deploy sonobuoys and have greater endurance and capacity to deploy them.

  6. Naval Physical and Oceanographic Laboratory - Wikipedia

    en.wikipedia.org/wiki/Naval_Physical_and...

    Different Sonar Range Prediction models are also developed by NPOL in the recent years which are used by Indian Navy. [2] [3] On 29 October 2024, NPOL placed an order for a new Acoustic Research Ship (ARS) with the Garden Reach Shipbuilders & Engineers, Kolkata. The order worth ₹ 490.98 crore (US$57 million) was signed in Kochi. The ARS will ...

  7. Type 037 corvette - Wikipedia

    en.wikipedia.org/wiki/Type_037_corvette

    The biggest improvement, however, it's in the sonar system. Original SJD-3 sonar on earlier Type 037 class submarine chaser is replaced by a 13 kHz (2 frequency ranges) French Thomson Sintra SS-12/DIP 12 hull mounted (HM)/variable depth sonar (VDS). DIP 12, the VDS version weigh 4 tons and has a 200-meter cable with towing speed of 16 kn, and ...

  8. Secret US Navy underwater microphones detected Titan sub ...

    www.aol.com/secret-us-navy-underwater...

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  9. Harbin Z-9 - Wikipedia

    en.wikipedia.org/wiki/Harbin_Z-9

    Configured with pulse-compression radar, low frequency dipping sonar, radar warning receiver and doppler navigation system, it is also armed with torpedoes for use aboard Pakistan Navy's Zulfiquar-class frigates. [6] Z-9G Export version of the WZ-9 gunship. [7] Z-9EH Transport, emergency and/or passenger variant. [8] Z-9W Also known as WZ-9.