Submarines
Nuclear-powered Ballistic Missile Submarines SSBN
Check out our 2022 comparative overview pos on World ballistic missile boats.
Arihant class (2 active, 2 planned) LOA 364′ / 110.9 m TDISP 6,000 tons. 12 tubes/boat, with short and intermediate range SLBMs. The two planned units will have as many as 24 tubes.
Attach Submarines (Diesel-Electric)
Sindhughosh class (Russian Kilo class) LOA 238′ / 72.5 m TDISP 3,030 tons submerged (8 active, 2 retired, service since 1986)
Shishumar class LOA 211′ / 64.3 m TDISP 1,850 tons submerged (4 active, service since 1986)
Vela Class LOA 300′ / 91.4 m TDISP 2,500 tons submerged. Updated variant of Foxtrot class. INS Vagli may be preserved as a museum. (4 retired, service 1973-2010) 
INS Vagli S-42 (1974-2010) On display at Chennai Port since 2016. Efforts underway for long term preservation in Tamil Nadu. 
INS Kursura S-20 (1969-2001) Kalvari class LOA 300′ / 91.4 m TDISP 2,500 tons submerged. Early variant of Foxtrot design for Indian Navy. Museum boat.
The Searchers 