NEW DELHI, Dec. 14 (Xinhua) -- Indian Prime Minister Narendra Modi Thursday inducted INS Kalvari, the first of six Scorpene-class submarines in the Indian navy, officials said.
The modern non-nuclear submarine touted as India's deadliest submarine was commissioned formally into navy at Naval Dockyard in Mumbai, the capital city of Maharashtra state.
Indian Defense Minister Nirmala Sitharaman, Navy Chief Admiral Sunil Lanba, top defence officials and other dignitaries were present at the ceremony.
The submarines were designed by French naval defence and energy company DCNS.
Officials said Kalvari underwent around 120 days of extensive sea trials and tests for various equipment.
The first Kalvari, commissioned on Dec. 8, 1967, was also the first submarine of the Indian navy. It was decommissioned on May 31, 1996 after nearly three decades of service.