New Delhi: India is preparing for a major upgrade in its sea-based nuclear deterrence system as the Indian Navy moves closer to testing the advanced K-5 submarine-launched ballistic missile (SLBM) from its newest nuclear-powered submarine, INS Aridhaman (S4).
The K-5 missile is expected to significantly increase India’s strategic strike range and strengthen the country’s second-strike nuclear capability.
Reports suggest that the missile may also feature MIRV technology, allowing a single missile to carry multiple nuclear warheads capable of striking different targets.
What Is INS Aridhaman?
INS Aridhaman is the third Arihant-class nuclear-powered ballistic missile submarine (SSBN) developed under India’s Advanced Technology Vessel (ATV) program.
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Compared to INS Arihant and INS Arighaat, the S4 submarine has a larger hull and higher displacement of around 7,000 tonnes. This expanded design allows it to carry more advanced and longer-range missiles.
The submarine is considered a key part of India’s nuclear triad, which includes:
- Land-based nuclear missiles
- Air-delivered nuclear weapons
- Sea-based nuclear deterrence systems
Military experts believe sea-based deterrence is the most survivable component because submarines can remain hidden underwater for long periods.
What is K-5 Missile
The K-5 SLBM is being developed by India’s Defence Research and Development Organisation (DRDO).
According to available reports, the missile is expected to have:
- Range of around 5,000 to 6,000 km
- Three-stage solid-fuel propulsion system
- Nuclear payload capability
- MIRV integration capability
- Advanced penetration aids to bypass missile defence systems
The missile is expected to be the underwater equivalent of India’s Agni-V intercontinental ballistic missile.
Indian Navy K-5 Missile Technology: How K-5 Is Different from K-4
India currently operates the K-4 SLBM, which has a strike range of around 3,500 km.
The K-5 missile is expected to offer:
- Longer range
- Better survivability
- Improved targeting capability
- Higher payload flexibility
The K-4 is mainly designed for regional deterrence, while the K-5 could give India broader intercontinental reach.
MIRV Technology Could Change India’s Strategic Position
One of the most important aspects of the K-5 program is the expected use of MIRV (Multiple Independently Targetable Re-entry Vehicle) technology.
MIRV allows one missile to carry multiple warheads that can hit different targets independently.
This technology provides several strategic advantages:
- Greater deterrence capability
- Ability to penetrate missile defence shields
- Reduced number of missiles needed for multiple targets
- Improved survivability during nuclear conflict
India has already tested MIRV technology under the Agni missile program, and experts believe the same capability may be adapted for future submarine-launched systems.
What is the Need of Indian Navy K-5 Missile Technology
Strategic analysts say longer-range submarine-launched missiles are important because they allow submarines to stay safely inside the Indian Ocean while still being able to reach distant targets.
This improves stealth and survivability.
Shorter-range missiles may require submarines to move closer to hostile waters, increasing operational risks.
The K-5 missile is expected to solve this challenge by giving Indian SSBNs the ability to launch from safer patrol zones.
India’s Expanding SSBN Fleet
India is steadily expanding its nuclear submarine fleet.
Current and upcoming platforms include:
- INS Arihant
- INS Arighaat
- INS Aridhaman (S4)
- S4*
- Future S5-class submarines
The future S5-class submarines are expected to be larger and capable of carrying even more advanced missiles such as the K-6 SLBM.
