INS Arighat’s general characteristics: a glimpse into India’s underwater defence advancements

Originally planned to be completed in 2024, the ATV project had delays in its 2017 launch. Its armament, testing capabilities down to 400 metres, and remarkable speeds all contribute to its strategic significance, even with just one CLWR-B1 reactor.

As the second nuclear-powered ballistic missile submarine built by India as part of the Advanced Technology Vessel (ATV) project, INS Arighat is an enhanced version of the Arihant-class submarine. As part of India’s efforts to improve its nuclear submarine capabilities, the ship was built at the Ship Building Centre in Visakhapatnam. The submarine, formerly known as INS Aridhaman, was covertly launched in 2017 and its current state and attributes were not widely disclosed to the public. S3 is the code name assigned to the submarine.

INS Arighat, outfitted in December 2010 and originally scheduled for debut in 2011, experienced major delays. Reports from October 2017 suggested that the launch might occur in November or December of that year, after the required outfitting. October 18, 2017, was the actual launch date.

The submarine was supposed to be commissioned in 2022 with INS Vikrant, however as of October 2022, it was undergoing harbour trials. INS Arighat was not formally commissioned as of February 5, 2023, and the precise commissioning date was unknown. For the most recent information on the submarine’s development, INS Arighat is currently anticipated to be commissioned in 2024, according to a story from the Hindustan Times.

General Characteristics:

INS Arighat belongs to the Arihant class of ballistic missile submarines, forming a strong component of India’s naval forces. As a ballistic missile submarine, its major mission is to carry and fire ballistic missiles, providing a critical aspect of the country’s strategic deterrence. The vessel’s discrete nature is further highlighted by the fact that the precise surface displacement, length, beam, and draft specifications are confidential.

The nuclear propulsion system of INS Arighat, which has a single propeller shaft and is powered by a single CLWR-B1 Compact Light-water reactor with a capacity of 83 MW, allows for durable and adaptable underwater operations. When submerged, the submarine can reach astounding speeds of 24 knots, but when surfaced, it can reach 12 to 15 knots. The only things that restrict its operational range are the requirements for food supply and routine maintenance.

Testing capabilities of the vessel reach depths of 300 to 400 metres, proving its sturdy construction and capacity to function well in a variety of underwater environments. INS Arighat has the Panchendriya unified submarine sonar, control system, and underwater communication system in addition to USHUS sonar, to improve situational awareness and detection capabilities.

Equipped with a potent armament consisting of 12 K15 SLBMs, which can cover 750 km or 470 mi, or 4 K-4 SLBMs, which can cover 3,500 km or 2,200 mi. To enhance its missile capacity, the submarine is equipped with six 21″ (533 mm) torpedo tubes, each of which can hold about 30 charges—that is, mines, missiles, or torpedoes. This varied weaponry reinforces the strategic asset status of INS Arighat in defending the maritime interests and national security of India.