The Scorpene-class diesel electric submarine Kalvari has begun sea trials. Six of these submarines are to be delivered to the Indian Navy by 2020.
The Scorpène-class submarines are a class of diesel-electric attack submarines jointly developed by the French DCN and the Spanish company Navantia and now by DCNS. It features diesel propulsion and an additional air-independent propulsion (AIP).
In 2005, India chose the Scorpène design; purchasing six submarines for US$3 billion ($500 million per boat). These submarines are to be manufactured under a technology transfer agreement by the state-owned Mazagon Docks in Mumbai and delivered between 2012 and 2016, however the project is running four years behind schedule

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