Private industrial players like Larsen and Tourbo and Tata Power helped in making the project a reality.

'The second submarine will have more indigenous components,' Verma told IANS.

According to sources, construction on the second submarine has already begun.

'The trials will have to be undertaken to establish the reliability. Design is only the dream of a person and implementing it is different,' Verma said, adding that '11 years to construct a submarine is not bad at all'.

The project had to face initial hurdles like technology denial and miniaturising the nuclear reactor to fit the 110-metre long and 11-metre wide submarine, which has a surface displacement of 6,000 tonnes.

The nuclear power will help the submarine to remain underwater for longer durations - a factor that will help increase the geographical reach and endurance of the Indian Navy.

The submarine will be manned by a crew of roughly 100 sailors trained in India.

The launch ceremony was performed by Prime Minister Manmohan Singh's wife Gursharan Kaur here.