Arihant was launched in 2009 and quietly entered service in August 2016, after several delays.

INS Arihant (SSBN 80) (Sanskrit for Slayer of Enemies) is the lead ship of India's Arihant class of nuclear-powered ballistic missile submarines. INS Arihant completes India's nuclear triad, PM Modi felicitates crew 06 Nov, 2018, 07.36 AM IST Stressing the significance of the successful deployment of INS Arihant for the completion of India's nuclear triad, the Prime Minister congratulated the crew and all involved in the achievement which puts India among a handful of countries having the capability to design, construct and operate SSBNs. In fact, some sources in the navy have characterised the commissioning of the first-in-class INS Arihant as a technology demonstrator, rather than a robust deterrent projector.

INS Arihant is the first of a class of ballistic missile submarines for the Indian Navy. The latter pair are undergoing construction as of 2018. INS Arihant, India’s first indigenous nuclear submarine, was launched amidst fanfare, chest-thumping and belligerence in August 2016.

INS Varsha is a new naval base being developed under Project Varsha for the Indian Navy. INS Arihant INS Arihant (SSBN 80) (Sanskrit for "Slayer of Enemies") is the lead ship of India's of nuclear-powered ballistic missile submarines. INS Arihant (SSBN 80) (Sanskrit for Slayer of Enemies) is the lead ship of India's Arihant class of nuclear-powered ballistic missile submarines.
The Arihant is expected to be commissioned for full service with the Indian Navy in the near future. INS Arihant (Sanskrit language: अरिहंत, meaning "Slayer of Enemies" (S-73)) is the lead ship of India's Arihant-class of nuclear-powered ballistic missile submarines.The 6,000 tonne vessel was built under the Advanced Technology Vessel (ATV) project at the Ship Building Centre in Visakhapatnam.. [50] On 13 December 2014, the submarine set off for its extensive sea trials. The 6,000 tonne vessel was built under the Advanced Technology Vessel (ATV) project at the Ship Building Centre in the port city of Visakhapatnam.It has the code name S2.The vessel is classified as a Strategic Strike Nuclear Submarine by India.

INS Varsha Naval Base :: Also the work on INS Varsha is on full swing according to recent satellite images.

The second boat, INS Arighat, was laid down in 2011 and was launched in November 2017. It is being built under the Advanced Technology Vessel (ATV) project to build nuclear submarines at the Ship Building Centre in Visakhapatnam. These have a range of 3 000-3 500 km and carry nuclear warheads. It is the second nuclear-powered ballistic missile submarine being built by India. The 6,000 tonne vessel was built under the Advanced Technology Vessel (ATV) project at the Ship Building Centre … India’s Lone Arihant-class SSBN Has Been Out of Service for Months. Call it a lesson learned for the Indian navy, which managed to put the country’s first nuclear-missile submarine, the $2.9 billion INS Arihant, out …

INS Arihant is India’s first nuclear-powered ballistic submarine with a design that is reportedly based on the Akula-class submarine. INS Arihant ' s reactor went critical for the first time on 10 August 2013.
Arihant’s design is based on the Russian Akula-1 Class submarine. Arihant was built at the Shipbuilding Centre of Visakhapatnam and launched on July 26th, 2009. It is reported that Arihant carries four K-4 ballistic missiles. It has the code name S3. INS Arihant: Pak expresses concern over deployment of India’s nuclear submarine 08 Nov, 2018, 10.52 PM IST.

[6] The first boat of [8] the class, INS Arihant, was commissioned in August 2016.