2016
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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3
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7
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4
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2
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Detailed explanation-1: -The systems included Abhay-compact hull mounted sonar for shallow water crafts, Humsa UG-upgrade for the Humsa sonar system, NACS-Near-field Acoustic Characterisation System, and AIDSS-Advanced Indigenous Distress sonar system for submarines.
Detailed explanation-2: -USHUS is used for detecting and tracking enemy submarines, surface vessels, and torpedoes and can be used for underwater communication and avoiding obstacles.
Detailed explanation-3: -Passive sonar systems are used primarily to detect noise from marine objects (such as submarines or ships) and marine animals like whales.
Detailed explanation-4: -Mid-frequency active sonar (1kHz-10kHz) is the Navy’s primary tactical sonar and its main tool to combat the threat posed by the world-wide proliferation of ultra-quiet diesel submarines.
Detailed explanation-5: -In response to devastating Allied shipping and human losses from U-boat attacks during World War II, the Navy began using sonar.