Mumbai: Kalvari, Indian Navy's first indigenous Scorpene-class stealth submarine, today sailed out of Mumbai Harbour for sea trials even as the plan to purchase heavy-weight torpedos for the vessel remains stuck due to the VVIP chopper scam.

Kalvari is the first of the India's six Scorpene-class submarines being built under the much-delayed Project 75. The vessels are being built by Mazagon Dock Limited (MDL) in collaboration with French company DCNS.