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Indian Navy to commission INS Karanj

Published: 8th Mar, 2021


The Indian Navy will commission its third Scorpene-class submarine, the INS Karanj, in Mumbai.


What is INS Karanj?

  • It is a Scorpene-class submarine built under Mazagaon Docks Limited (MDL)Project-75 in collaboration with a French firm.
  • It is a diesel-electric attack submarine.
  • Stealth features: The submarine has superior stealth features-
  • advanced acoustic silencing techniques
  • low radiated noise levels
  • ability to launch crippling attacks with precision-guided weapons on board
  • The stealth features give it an edge unmatched by most submarines.
  • It is also designed to operate in all theatres of operation, showcasing interoperability with other components of a naval task force.
  • The attacks can be launched with torpedoes and anti-ship missiles, while underwater or on the surface.

Status of another Scorpene-class submarine

  • The Navy has inducted two submarines of the same class - the INS Kalvari and INS Khanderi
  • Trials of two – the Vela and Vagir – are underway.
  • The construction of the sixth Vagsheer is underway.


  • The P75I Scorpene-class diesel-electric / air-independent propulsion (AIP) submarines are based on the Scorpene-class submarines, which were designed by French naval shipbuilding firm DCNS.
  • After the Kargil War in 1999, Cabinet Committee on Security approved a 30-year submarine building plan that called for two parallel production lines, each constructing six submarines.
  • Under this project, the Indian Navy intends to acquire six diesel-electric submarines.
  • They will feature advanced air-independent propulsion systems to enable them to stay submerged for a longer duration and substantially increase their operational range.

6 Submarines built under the project

  • INS Kalvari, INS Khanderi, INS Karanj, Vela, Vagir and Vagsheer.

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