India Conducts Successful K-4 Missile Test, Enhancing Its Sea-Based Nuclear Capability
India has achieved a significant advancement in its sea-based nuclear strike capabilities by successfully testing the K-4 submarine-launched ballistic missile (SLBM). The missile was launched from the nuclear-powered submarine INS Arighaat in the Bay of Bengal, near the coast of Visakhapatnam, on Tuesday.
The K-4 missile enhances India's undersea nuclear deterrence, with its ability to reach targets up to 3,500 kilometres away. This development rounds off an essential part of India's nuclear triad, enabling the nation to deploy nuclear weapons from land, air, and sea.
Commissioned into the Indian Navy on August 29, 2024, the K-4 SLBM positions India among a select group of nations with operational submarine-launched nuclear missile capability. It can carry a 2.5-ton nuclear warhead and is designed for deployment from Arihant-class nuclear submarines.
Adapted from the land-based Agni-III ballistic missile, the K-4 has undergone modifications for underwater launch. This missile is engineered to be expelled from a submarine launch silo, surface through the ocean, and ignite its rocket motor to initiate powered flight, a sophisticated capability achieved by only a few countries.
According to defence experts, the K-4 represents the stealthiest component of India's nuclear triad. Ballistic missile submarines are designed to operate quietly over prolonged deterrence patrols, remaining concealed in vast oceanic regions, thereby ensuring a credible second-strike capability.
The K-series missiles are named in honour of A P J Abdul Kalam, recognizing his crucial contributions to India's Integrated Guided Missile Development Programme (IGMDP).
This successful test highlights India's advancing strategic maturity, domestic missile development prowess, and dedication to sustaining a credible minimum deterrence stance amid a complex regional security landscape.
