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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]
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.
Bold (also called Bolde, a term derived from kobold) was a German sonar decoy, used by U-boats during the Second World War from 1942 onwards. It consisted of a metal canister about 10 cm (3.9 in) in diameter filled with calcium hydride. It was launched by an ejector system colloquially referred to as Pillenwerfer (English: "pill thrower").
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.
Atlas Elektronik is a naval/marine electronics and systems business based in Bremen, Germany. It is involved in the development of integrated sonar systems for submarines and heavyweight torpedoes. The company was a subsidiary of BAE Systems until December 2005, when it was sold to ThyssenKrupp and EADS.
processing systems: Radar Don-2; Slim Net ; Hawk Screech; Sonar - Herkules hull mounted & dipping sonar; Armament: 4 76 mm (3 in) guns (2x2) 4 RBU-6000 anti-submarine rocket launchers (2 in some ships) 5 406 mm (16 in) anti-submarine torpedo tubes
Acoustic detectors used to track enemy submarines picked up the fatal blast
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.