Arihant is a

INS Arihant is India's first indigenous nuclear-powered ballistic missile submarine (SSBN). It was developed under the Advanced Technology Vessel (ATV) project and commissioned into the Indian Navy in 2016. As an SSBN, it is capable of carrying and launching nuclear-tipped ballistic missiles, specifically the K-series (K-15 and K-4) missiles. The induction of Arihant completed India's nuclear triad, providing the nation with a credible second-strike capability from the sea. While the provided snippets discuss general submarine canyons [3] and nuclear history [1], they do not explicitly detail the Arihant's technical specifications. However, it is well-established in Indian defense architecture that Arihant is neither a rocket launcher like Pinaka, an AEW&C system like Netra, nor a UCAV like Rustom. It remains the lead ship of its class of nuclear-powered submarines.

Sources

1. [3] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 31: Ocean Relief > Submarine Canyons > p. 483
2. [1] Rajiv Ahir. A Brief History of Modern India (2019 ed.). SPECTRUM. > Chapter 38: Developments under Nehru’s Leadership (1947-64) > Progress of Science and Technology > p. 647