India’s Next-Gen submarine

arihantINS Aridhaman is the second nuclear-powered ballistic missile submarine being built by India. It is being built under the Advanced Technology Vessel (ATV) project to build nuclear submarines at the Ship Building Centre in Visakhapatnam. Even though the same class as INS Arihant, It will feature 8 launch tubes instead of the 4 giving her double the firepower of Arihant. Thus she could carry 24 K-15 Sagarika short range SLBMs or 8 K-4 long range SLBMs. It will also feature more powerful reactor than her predecessor.

The boat will have a seven-blade propeller powered by a pressurised water reactor. It can achieve a maximum speed of 12–15 knots (22–28 km/h) on water surface and 24 knots (44 km/h) underwater.The submarine has eight launch tubes in its hump. It can carry up to 24 K-15 Sagarika missiles (each with a range of 750 km or 470 mi), or 8 of the under-development K-4 missiles (with a range of 3,500 km or 2,200 mi).

Engine and Performance

The Arihant Class submarine will propelled by one seven-blade propeller which will be powered by a Pressurised Water Reactor(PWR) (nuclear). In a PWR, the primary coolant (water) is pumped under high pressure to the reactor core where it is heated by the energy generated by the fission of atoms. The heated water then flows to a steam generator where it transfers its thermal energy to a secondary system where steam is generated and flows to turbines which, in turn, spin an electric generator.

The submarine can achieve a maximum speed of 12-15 knots (22-28 km/h) when on surface and 24 Knots (44 km/h) when submerged.The depth to which submarine will be submerged is from 300m to 400m.

Sensors and Processing System

INS Aridhaman will be fitted with sonar ISS (Integrated Sonar Suite),State-of-art sonar integrated sonar system USHUS sonar developed by Naval Physical and Oceanographic Laboratory (NPOL) of the Defence Research and Development Organisation (DRDO), India. The submarine will also have Panchendriya sunar which is a unified submarine sonar and tactical control system, and it includes all types of sonar (passive, surveillance, ranging, intercept, obstacle avoidance and active).It is used for detecting and tracking enemy submarines, surface vessels, and torpedoes and can be used for underwater communication and avoiding obstacles.

The hull features twin flank-array sonars and Rafael broadband expendable anti-torpedo countermeasures.


INS Aridhaman has eight launch tubes in its hump. It can carry up to 24 K-15 Sagarika missile each with a range of 750 km (470 mi) or 8 of the under-development k-4 missiles SLBM (with a range of 3,500 km (2200 mi).The submarine also integrated with 6 torpedo tubes of 21” (533 mm).

Launch of INS Aridhaman :::

This is one of India’s top secret military projects and hence there are absolutely no reports on the progress of the construction of this deadly nuclear submarine. All we know is that INS Aridhaman after clearing all trials will dominate the Indian Ocean by the end of 2018, if all goes as per schedule. Reportedly Aridhaman is currently undergoing outfitting at Shipbuilding Centre (SBC) in Visakhapatnam.


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