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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.
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]
AN/AQS-13 Dipping sonar deployed from an H-3 Sea King, an aircraft used by numerous countries and produced in Italy, Japan, and the United Kingdom Antisubmarine helicopters can carry a "dipping" sonar head at the end of a cable, which the helicopter can raise from or lower into the water.
Airborne dipping sonar: SH-3A Sea King: AN/AQS-13: Airborne anti-submarine warfare (ASW) dipping sonar, improved AN/AQS-10: SH-3D Sea King, SH-60F Seahawk: L3Harris Technologies: AN/AQS-20: Sonar mine countermeasure: Raytheon: AN/AQS-22: Advanced Airborne Low-Frequency Sonar (ALFS) MH-60R Seahawk: Telephonics Corporation
Early trials were conducted using an experimental dipping sonar called "Hot Dog", a harbour defence sonar capsule lowered over the side or rear of a stationary ship by electrical cable. The trials confirmed the possibility of achieving long detection ranges and the reduced efficacy of hull-mounted sonar against targets in the middle layer.
The Ka-27PL anti-submarine version is equipped with a radar, and either a dipping sonar or a magnetic anomaly detector. It can also carry either up to 36 sonobuoys, or a torpedo, or between six and eight conventional depth charges, or a single nuclear one. Ka-27PLs generally operate in pairs as hunter-killer teams. [1]
BAD BOY “Bad Boy,” the new drama from “Euphoria” creator Ron Leshem and writer Hagar Ben-Asher (“Dead Women Walking”), has been snapped up by Netflix internationally.
This, coupled with improvements to sonar systems, made ballistic missile submarines more vulnerable to attack submarines and also increased the anti-surface warfare (ASuW) capabilities of attack subs. SSBNs themselves as well as cruise-missile submarines (SSGNs) were fitted with increasingly more accurate and longer range missiles and received ...