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India successfully tests its 3,500km-range K-4 missile

The three-metre-tall missile carries a nuclear warhead of over one tonne with a circular error probability (CEP) far lower than that of Chinese ballistic missiles.

Updated on: Jan 20, 2020, 05:27:29 IST
Hindustan Times, New Delhi | By
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The Indian strategic forces got a major boost on Sunday after the Defence Research and Development Organisation (DRDO) tested a 3,500-kilometre range submarine-launched K-4 ballistic missile off the Vizag coast, with the nuclear weapon meeting all its target objectives, officials with direct knowledge of the matter said.

Indian strategic forces got a major boost on Sunday after the Defence Research and Development Organisation (DRDO) tested a 3,500-kilometre range submarine-launched K-4 ballistic missile (Reuters (Representative Image))
Indian strategic forces got a major boost on Sunday after the Defence Research and Development Organisation (DRDO) tested a 3,500-kilometre range submarine-launched K-4 ballistic missile (Reuters (Representative Image))

The three-metre-tall missile carries a nuclear warhead of over one tonne with a circular error probability (CEP) far lower than that of Chinese ballistic missiles. Only the US, Russia and China have submarine-launched ballistic missiles of 3,500-kilometre range. The INS Arihant is already equipped with a 700-kilometre range B-02 nuclear missile, with the second nuclear submarine INS Arighat on way to becoming operational.

Top government officials told Hindustan Times that with this test India has moved one more step towards the induction of this ballistic missile on the INS Arihant class of nuclear submarines. The missile was fired off a pontoon between 12 noon and 1pm off the Vizag coast in Andhra Pradesh and the delivery platform was tracked over 1,500 kilometres before it shifted to ship-based radars.

“The full results of the missile test will be known in the days to come after the tracking ships return to base. It is only on that basis that we will decide whether to conduct more tests before making the missile operational. Even in the case of the Agni-5 ballistic missile, the nuclear weapon was made operational after conducting two tests,” said a top official.

While the K-4 was to be tested last November, the test was delayed due to Cyclone Bulbul that made the weather conditions in the Bay of Bengal not conducive to the launch and tracking of the missile. DRDO missile scientists led by Satheesh Reddy were waiting for a window to open for the test.

DRDO scientists were happy with how the K-4 test went as the CEP of the Indian strategic missile is less than 100 metres as compared to the 1-2 kilometre range of the Chinese equivalent. The submarine-launched ballistic missile is the most important part of the air, land and sea nuclear triad and is at the front of India’s second-strike capability. With the K-4 and the Agni-5 missiles in its nuclear arsenal, Indian strategic forces now have a deterrent against all adversaries to the north and south, besides capability of protecting the Indo-Pacific.

While DRDO officials were tight-lipped about the details of the missile, the K-4 test met all classified mission objectives. With the DRDO having the capability to conduct laboratory missile tests, India has the ability to build nuclear delivery platforms with far more than officially stated ranges.

  • Shishir Gupta
    ABOUT THE AUTHOR
    Shishir Gupta

    Shishir Gupta is Executive Editor at Hindustan Times and one of India's top journalists covering national security, strategic affairs, foreign policy and geopolitics. Over the past three decades, he has extensively reported on India's military, diplomatic and security landscape, covering every major conflict and national security challenge, from the 1999 Kargil War and the 2020 East Ladakh standoff to Operation Sindoor in 2025. He has also covered major terror attacks, including the IC-814 hijacking, the 26/11 Mumbai attacks and the 2025 Pahalgam terror strike, along with numerous Pakistan-backed terrorist incidents in the Kashmir Valley and across India. He has reported on national and state elections for more than three decades. A recognised authority on strategic affairs, Gupta has covered India's nuclear programme since the Pokhran-II (Shakti series) tests in May 1998 and has written extensively on global nuclear issues, Indian diplomacy and the country's expanding global outreach. He has also reported widely on international conflicts and terrorism, with a special focus on the Indian subcontinent. Gupta has interviewed Prime Minister Narendra Modi more than four times, including Modi's first interview with the print media after becoming Prime Minister in May 2014. His other interviews include three with the Dalai Lama, as well as conversations with Benjamin Netanyahu, Amit Shah, Yogi Adityanath, S. Jaishankar, Nirmala Sitharaman and Piyush Goyal. He is the author of Indian Mujahideen: The Enemy Within (Hachette, 2011) and Himalayan Face-off: Chinese Assertion and Indian Riposte (Hachette, 2014). He was awarded the Chevening-Wolfson Joint Scholarship at Wolfson College, University of Cambridge, UK, in 1998 and participated in the International Visitor Leadership Program (IVLP) of the US State Department in 2006. He received the Ben Gurion Prize from Israel in 2011 and the K. Subrahmanyam Prize for Strategic Studies in 2015 from the Manohar Parrikar Institute for Defence Studies and Analyses (MP-IDSA). Since 2024, he has hosted Point Blank, Hindustan Times' weekly YouTube show on global geopolitics.Read More

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