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Science and Technology › Defence

Guardians of India’s Maritime Frontiers

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Why in News?

The Indian Navy recently commissioned INS Mahendragiri, INS Dunagiri, INS Sanshodhak, and INS Agray, strengthening India’s indigenous maritime capabilities.

Key Highlights

  • Three indigenous naval classes strengthen India’s layered maritime security:
    • Nilgiri Class: Stealth Frigates (Project 17A)
    • Sandhayak Class: Survey Vessel (Large)
    • Arnala Class: Anti-Submarine Warfare Shallow Water Craft (ASW-SWC)
  • Designed by the Warship Design Bureau (WDB) with high indigenous content under Aatmanirbhar Bharat.
  • Protect India’s 11,098 km coastline, 2.4 million sq km Exclusive Economic Zone (EEZ), and sea lanes carrying ~90% of India’s trade by volume.

About the Three Classes

  • Nilgiri Class (Project 17A): Next-generation stealth guided missile frigates for anti-air, anti-surface, and anti-submarine warfare.
    • Equipped with BrahMos missiles, advanced radar, sonar, and helicopters.
  • Sandhayak Class: Conducts hydrographic surveys, seabed mapping, and nautical charting.
    • Supports the Blue Economy, navigation safety, and disaster relief.
  • Arnala Class: Designed for coastal anti-submarine warfare in shallow waters.
    • Equipped with lightweight torpedoes, ASW rockets, and shallow-water sonar.

Strategic Significance

  • Strengthens Aatmanirbhar Bharat through indigenous shipbuilding.
  • Supports SAGAR (Security and Growth for All in the Region) and MAHASAGAR (Mutual and Holistic Advancement for Security and Growth Across Regions) visions.
  • Enhances maritime security, defence exports, and the Blue Economy.

[2016] Which one of the following is the best description of ‘INS Astradharini’, that was in the news recently?

[A] Amphibious warfare ship

[B] Nuclear-powered submarine

[C] Torpedo launch and recovery vessel

[D] Nuclear-powered aircraft carrier

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