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What is the K-4 Missile?

Dec. 25, 2025

India tested an intermediate-range ballistic missile called K-4, which is designed to hit targets 3,500-km away, from the nuclear-powered submarine INS Arighaat in the Bay of Bengal recently.

About K-4 Missile:

  • Kalam-4 or K-4 Missile, is a nuclear-capable intermediate-range submarine-launched ballistic missile (SLBM) designed mainly for deployment on Arihant-class submarines.
    • Each Arihant-class submarine can carry four K-4 missiles.
  • K-4 was indigenously developed by the Defence Research and Development Organisation (DRDO).
  • Features:
    • The missile has a two-stage solid-fuel system.
    • It has a range of around 3,500 km.
    • One of its key features is its ability to be cold-launched from underwater, which allows the missile to be ejected from the submarine before the engine ignites.
    • It is guided by an advanced inertial navigation system supported by GPS and India’s NavIC system.
    • This combination ensures high accuracy.
    • The missile is also equipped with manoeuvring features that help it evade missile defence systems.

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