Chanakya IAS Academy Blog



The first of the Scorpene class submarines, Kalvari, was delivered to the Indian Navy by Mazagon Dock Shipbuilders Limited (MDL) on Thursday. The submarine will soon be commissioned into the Indian Navy.

The delivery of a submarine means that its trials are over and the navy has accepted the boat. Commissioning is a ceremony that officially makes it a part of the navy’s fleet.

  • Kalvari which is named after the dreaded Tiger Shark is equipped with state of the art technology, including superior stealth features such as “advanced acoustic silencing techniques”, low radiated noise and the ability to launch a crippling attack on the enemy using precision guided weapons.
  • The Kalvari class is a class of submarines based on the Scorpène-class submarine being built for the Indian Navy.
  • It is a class of diesel-electric attack submarine which is designed by French naval defence and energy company DCNS and being manufactured by Mazagon Dock attack submarines jointly developed by the French Direction des Constructions Navales Limited in Mumbai.


  • The Scorpène-class submarines are a class of diesel-electric (DCN) and the Spanish company Navantia, and now by DCNS.
  • It features diesel propulsion and an additional air-independent propulsion (AIP).


  • Under Project 75, six Scorpene submarines are being built with assistance and technology transfer from DCNS of France under the deal signed in October 2005.
  • The first of the series INS Kalvari is completing sea trials and will be commissioned shortly.
  • The other four submarines are expected to be launched at nine-months intervals after the INS Khanderi.

Similarly, other Scorpene class submarines Khanderi and Karanj are undergoing trials and development. These developments can be seen as a significant step made towards modernising India’s ageing submarine fleet in the backdrop of China beefing up its naval strength and making forays into the Indian Ocean Region.

Moreover, even the tender for the long-delayed Project-75-India for the six new stealth submarines, with both land-attack missile capabilities and air-independent propulsion for greater underwater endurance, is yet to be floated.

Read 1160 times Last modified on Friday, 22 September 2017 13:08

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