About:

• The Scorpene class submarine is a diesel-electric attack submarine built by Mumbai’s Mazgaon Dock ship builders with French collaboration.
  
  
• The state-of-the-art technology used in Scorpene-class has superior stealth features such as advanced acoustic silencing techniques, low radiated noise levels and ability to launch crippling attacks with precision-guided weapons on board.
  
  
• This submarine can attack through launching the torpedoes and anti-ship missiles while underwater or on the surface. This will enhance Indian Navy’s capacity to address the threats both above and under water.
  
  

Background

• Four submarines of scorpene class- INS Kalvari, INS Khanderi, INS Karanj and INS Vela have already been commissioned while the fifth submarine Vagir is still undergoing sea trials.
  
  
• The first two submarines - INS Kalvari and INS Khanderi - were commissioned on September 21, 2017 and September 19, 2019.
  
  
• INS Karanj and INS Vela were commissioned in one calendar year in 2021 in the month of February and November respectively.