India’s submarine strength                                             

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Context: The CBI has charge sheeted naval officers and others for allegedly sharing details of India’s submarine modernization project.

How many submarines does India have?

• Currently, India has 15 conventional diesel-electric submarines, classified as SSKs, and one nuclear ballistic submarine, classified as
• Of the SSKs, four are Shishumar Class, which were bought and then built in India in collaboration with the Germans starting 1980s; eight are Kilo Class or Sindhughosh Class bought from Russia (including erstwhile USSR) between 1984 and 2000; and three are Kalvari Class Scorpene submarines built at India’s Mazagon Dock in partnership with France’s Naval Group, earlier called DCNS.
• The SSBN, INS Arihant, is a nuclear-powered ballistic missile submarine, built indigenously.
• A second SSBN, INS Arighat, an upgraded version of Arihant, is likely to be commissioned within the next few months.

https://indianexpress.com/article/explained/simply-put-indias-submarine-strength-7613847/