Prelims Level
Mains Level
Prelims Syllabus : Science & Technology- Defence Mains Syllabus : GS3K - Science and Technology - developments and their applications and effects in everyday life Achievements of Indians in science & technology; indigenization of technology and developing new technology.
  • Under this project, the Indian Navy intends to acquire Six Diesel-Electric Submarines, which will also feature Advanced Air-Independent Propulsion systems to enable them to stay submerged for longer duration and substantially increase their operational range.
  • Project 75 Mazgaon dock ship buliders limited (MDL) will maufacture six Scorpene sub marine for Indian Navy.
  • Technology Transfer from Naval Group of France.


  • India’s current arsenal consists of 14 conventional submarines and two nuclear- powered submarines.
  • The P75I project is part of a 30-year submarine building plan that ends in 2030.
  • As part of this plan, India was to build 24 submarines — 18 conventional submarines and six nuclear-powered submarines (SSNs) — as an effective deterrent against China and Pakistan.
  • The first Scorpene submarine INS Kalvari under P75 was launched in October 2015.
  • The third in Scorpene series INS Karanj was launched in January 2019. The fifth Scorpene-class submarine INS Vagir and sixth Scorpene-class submarine INS Vagsheer.
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