It is the first of the six French Scorpene submarines being built in India

The first of the six Scorpene submarines, being built in India under technology transfer from France, is likely to join the Navy by July or August.

Kalvari is named after a deep-sea tiger shark.

Background
Six Scorpene submarines are being built under Project-75 by Mazagon Docks Ltd. with technology transfer from DCNS, a French naval shipbuilder.

Trial for Khanderi
The second Scorpene submarine Khanderi — named after an island fort of Maratha ruler ChhatrapatiShivaji —will begin sea trials in June.

(Adapted from The Hindu)