Nuclear-powered Ballistic Missile Submarines SSBN
Arihant class (2 active, 2 planned) LOA 364′ TDISP 6,000 tons
Attach Submarines (Diesel-Electric)
Sindhughosh class (Russian Kilo class) LOA 238′ TDISP 3,030 tons submerged (8 active, 2 retired, service since 1986)
Shishumar class LOA 211′ TDISP 1,850 tons submerged (4 active, service since 1986)
Vela Class LOA 300′ 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′ TDISP 2,500 tons submerged. Early variant of Foxtrot design for Indian Navy. Museum boat.