What is the name of first indigenously-built submarine

Solution

After years of delays and controversies, the Kalvari, India’s first Scorpene submarin successfully test-fired an anti-ship missile at a target in the This missile launch is a significant milestone, not only for the Kalvari, which is the first in a series of Scorpene-class submarines being built in India, but also in enhancing the Navy's sub-surface warfare capability. The submarine, capable of carrying 18 torpedoes and travelling 1,020 km underwater, is expected to help the Indian Navy fulfil its long-cherished dream of becoming a full-fledged blue-water navy. All six Kalvari submarines will be equipped with the missile, with a proven record in combat, to neutralise surface threats at extended ranges.