The submarines are being built in collaboration with French shipbuilding major Naval Group

MUMBAI: The Indian Navy today launched the third Scorpene class submarine Karanj.

Navy chief Admiral Sunil Lanba's wife Reena Lanba launched the submarine, which has been constructed by shipbuilder Mazagon Dock Limited (MDL) here.

"It (submarine) will undergo rigorous tests for the next one year before it is commissioned," Admiral Lanba said on the occasion.

Total six submarines are going to be built at the MDL.