Context: As the procurement of new submarines under P-75I goes on, the Defence Research and Development Organisation (DRDO) has taken up a preliminary study on the design and development of an indigenous conventional submarine under Project-76.

What is Project-75I?

  • Project-75 (India), also known as P-75(I), is a military acquisition initiative by the Ministry of Defence (MoD). 
  • The initiative aims to procure diesel-electric attack submarines with fuel cells and Air-Independent Propulsion System (AIP) for the Indian Navy to build India’s naval strength and develop indigenous submarine-building capabilities.

Difference between Project 75 and Project 75I?

  • Project 75I is a follow-up to Project 75 and improves upon the design and technology of its predecessor. 
  • The conventional diesel-electric submarines such as the Scorpene, under Project 75, come with improved stealth features such as advanced acoustic absorption techniques, low radiated noise levels, long-range guided torpedoes, tube-launched anti-ship missiles, sonars and sensor suites.
  • However, as electrical batteries power them, they need to surface every 48 hours to be recharged. 
  • The AIP technology will improve on this in Project 75I building six submarines that can stay submerged for up to two weeks. 
    • An AIP module acts as a force multiplier as it enables conventional submarines to remain submerged for a longer duration thereby increasing their endurance and reducing chances of detection.
  • These submarines may even be larger in size compared to the ones under Project 75.
  • Another staggering difference between the projects is the budget, while Project 75 came to just Rs 23,000 crore, Project 75I is beginning at almost double the budget at a staggering Rs 43,000 crore.

However, as the bidding on Project-75I has only just begun, the project itself may take another two years before it starts.

Q. What is “Project-75I”, sometimes seen in the news, related to?

(a) India’s indigenous anti-missile programme

(b) Diesel-electric attack submarines

(c) A defence collaboration between United States and Israel

(d) Nuclear-powered attack submarines

Answer: (b)

PYQ 2016:

Q. Which one of the following is the best description of ‘INS Astradharini’, that was in the news recently?

(a) Amphibious warfare ship

(b) Nuclear-powered submarine

(c) Torpedo launch and recovery vessel

(d) Nuclear-powered aircraft carrier

Answer: (c)

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