India successfully tested a nuclear-capable ballistic missile with a range of approximately 3,500 km from the nuclear-powered submarine INS Arighaat in the Bay of Bengal.

Key Highlights of the Test

• The test was  conducted off the coast of Visakhapatnam, marking a significant advancement in India’s nuclear deterrence and strategic capabilities.
• The missile tested was the K-4, which enhances India’s second-strike capability under its nuclear triad.

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About INS Arighaat

• The INS Arighaat is India’s Second Indigenous Nuclear-Powered Ballistic Missile Submarine (S SBN) indigenously built nuclear-powered ballistic missile submarine, following the INS Arihant, its predecessor.
• It was constructed at the Indian Navy’s Ship Building Centre (SBC) in Visakhapatnam.

Features of INS Arighaat

• Nuclear Reactor Technology: Both the INS Arighaat and its predecessor, the INS Arihant, are powered by pressurized light-water nuclear reactors.
  • This allows them to remain submerged for extended periods compared to conventional diesel-electric submarines, which must surface frequently to recharge their batteries.

• Missile Capabilities: The submarine can carry:
  • Four K-4 Submarine-Launched Ballistic Missiles (SLBMs), each with a range of over 3,500 kilometers.
  • Alternatively, twelve K-15 SLBMs, capable of carrying conventional warheads with a range of around 750 kilometers.
• Speed and Submersion: On the surface, the submarine can achieve a maximum speed of 12–15 knots (22–28 km/h).
  • When submerged, it can reach a higher speed of 24 knots (44 km/h), enhancing its stealth and maneuverability underwater.

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Significance of the Test

• Strengthening Nuclear Deterrence: Demonstrates India’s ability to deliver a second strike in case of a nuclear attack, bolstering its strategic capabilities.
• Advancement in SLBM Technology: The successful launch of the K-4 missile ensures India’s place among nations capable of deploying nuclear weapons from submarines.
• Boost to Indigenous Defense Technology: Highlights India’s advancements in building nuclear-powered submarines and long-range missile systems indigenously.