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INS Kalvari, which means tiger shark, is the first Kalvari class submarine or Project 75. Launched on April 6, 2015 at Mazagaon Dockyard, the French-designed diesel electric attack submarine was manufactured in Mumbai. With a displacement of 1,565 tonnes, the vessel is 61.7 m long and can reach 20 knots when submerged and 12 knots when surfaces.