Project-75I: How India’s Rs 72,000 cr submarine upgrade reshapes the Pakistan, China equation

NEW DELHI: More than 5 decades aft Indian naval strikes crippled Karachi during the 1971 war, undersea powerfulness is erstwhile again astatine the bosom of New Delhi’s strategical thinking. As German Chancellor Friedrich Merz began his sojourn to India connected Monday amid a much volatile determination and planetary information environment, discussions astir Project-75I person acquired caller urgency.The Indian Navy’s program to induct six next-generation accepted submarines equipped with air-independent propulsion reflects a convergence of hard lessons from history, renewed friction with Pakistan pursuing caller crises, and China’s expanding undersea beingness successful the Indian Ocean. Together, these factors are pushing India towards 1 of its astir consequential naval procurement decisions successful years, 1 that blends deterrence, indigenisation and semipermanent strategical signalling.

What is Project-75I and wherefore it matters

Project-75I is the Indian Navy’s flagship programme to physique six modern diesel-electric submarines equipped with fuel-cell-based air-independent propulsion, precocious sensors, torpedoes and rocket systems. The Ministry of Defence issued the Request for Proposal for the task successful July 2021 nether the Strategic Partnership Model, describing it arsenic a cardinal pillar of the government’s Make successful India push, according to a PIB statement.

The task envisages indigenous construction, semipermanent exertion transportation and the instauration of a home submarine-building ecosystem. The estimated outgo was implicit Rs 40,000 crore astatine the RFP stage, with existent assessments placing the last declaration worth person to $8 billion, oregon astir Rs 72,000 crore, based connected configuration and lifecycle support.For the Indian Navy, the programme addresses a captious gap.

Its accepted submarine fleet is ageing adjacent arsenic undersea enactment by China and Pakistan increases successful the Indian Ocean and on India’s maritime approaches.

Why the German Type-214NG was selected

The Indian Navy has selected the German Type-214 Next Generation submarine, edging retired Spain’s S-80 Plus offered by Navantia, defence sources said. The determination was driven chiefly by the maturity of the German fuel-cell-based AIP system, acoustic stealth and little lifecycle risk.

AIP allows submarines to stay submerged for weeks without surfacing oregon snorkeling, reducing detection risk. In contested waters, endurance and soundlessness are decisive. The Type-214’s AIP exertion is wide regarded arsenic operationally proven, portion competing systems are inactive undergoing validation.In undersea warfare, reliability and survivability often outweigh novelty. That calculus appears to person guided the Navy’s choice.

Make successful India astatine the core

Under the projected framework, each six submarines volition beryllium built successful India astatine MDL, with TKMS providing plan authority, engineering expertise and method consultancy. Indigenous contented is expected to commencement astatine astir 45 percent and emergence to astir 60 percent by the last boat, aligning with Atmanirbhar Bharat goals.TKMS and MDL signed a memorandum of knowing successful June past twelvemonth to jointly prosecute the project, laying the groundwork for the partnership.

MDL’s anterior acquisition gathering Scorpène-class submarines nether the earlier Project-75 strengthened its lawsuit arsenic the Indian strategical partner.

The ministry of defence has repeatedly stressed that Project-75I is not lone astir acquiring platforms but astir absorbing analyzable submarine plan and operation technologies, arsenic outlined successful the 2021 PIB release.

Pakistan, Karachi and the logic of oversea denial

India’s accent connected undersea capableness is rooted successful history.

During the 1971 war, the Indian Navy’s attacks connected Karachi larboard crippled Pakistan’s maritime logistics and substance supply, accelerating Islamabad’s defeat. That occurrence stressed however power of the seas tin signifier outcomes connected land.The relevance of that acquisition resurfaced during Operation Sindoor successful May 2025, erstwhile tensions with Pakistan escalated pursuing a large panic provocation. Between May 8 and May 11, India placed its naval forces connected heightened readiness, with Karachi again emerging arsenic Pakistan’s astir captious vulnerability.

Karachi handles the bulk of Pakistan’s maritime commercialized and vigor imports. India’s quality to credibly endanger that hub, adjacent without firing a shot, highlighted the deterrent worth of naval and undersea power. New submarines with extended underwater endurance would sharpen that leverage.

China’s expanding undersea footprint

Beyond Pakistan, China looms ample successful India’s maritime menace assessment. The People’s Liberation Army Navy operates a rapidly expanding submarine fleet, including nuclear-powered platforms that person progressively deployed into the Indian Ocean.

Chinese submarines person docked astatine determination ports and conducted patrols adjacent to Indian waters, portion Pakistan, with Chinese assistance, is besides upgrading its submarine arm. For Indian planners, this duplicate situation has made restoring accepted submarine spot an urgent priority.

Project-75I is designed to plug that spread by giving India a survivable, persistent undersea capableness suited to monitoring choke points, tracking adversary submarines and conducting sea-denial operations.

Strategic timing of Merz’s visit

Chancellor Merz’s sojourn from January 12–13 comes amid a broader effort by Germany to grow its strategical footprint successful the Indo-Pacific. Berlin and New Delhi are besides moving toward an EU-India escaped commercialized agreement, arsenic noted by AFP.For India, the imaginable submarine woody fits into a wider diversification of defence partnerships beyond bequest suppliers specified arsenic Russia. For Germany, it represents an accidental to anchor a semipermanent concern and information narration with the world’s largest democracy.According to informed defence sources cited by idrw.org, the last declaration is not expected to beryllium signed during Merz’s sojourn but could beryllium concluded wrong the adjacent 3 months, with the high-level engagement expected to supply governmental momentum.

French-origin Scorpene follow-on program enactment connected clasp arsenic Project-75I gained priority

In October 2025, India enactment connected clasp plans to physique 3 further French-origin Scorpene submarines astatine Mazagon Dock Shipbuilders Limited, adjacent arsenic it moved decisively to propulsion up with Project-75I, which envisages the operation of six new-generation German-origin diesel-electric submarines astatine the aforesaid shipyard, The Times of India reported.Top authorities sources told TOI that the connection for the 3 further Scorpenes, estimated to outgo astir Rs 36,000 crore, “was not being pursued” astatine the time, though a ceremonial determination to scrap it had not been recorded. While outgo negotiations for the Scorpene follow-on bid had concluded successful the erstwhile fiscal, last clearance from the Prime Minister-led Cabinet Committee connected Security remained connected hold.Officials told TOI that the German submarines nether Project-75I were considered “a procreation ahead” successful presumption of exertion and capability. Concerns besides existed astir MDL’s quality to simultaneously execute 2 analyzable submarine operation programmes. The six archetypal Kalvari-class submarines had already been built astatine MDL nether the earlier Project-75 declaration signed successful October 2005, with the archetypal vessel INS Kalvari commissioned successful December 2017 and the sixth, INS Vagsheer, inducted successful January 2025.All six Kalvari-class submarines were slated to beryllium retrofitted with the DRDO-developed air-independent propulsion strategy to amended underwater endurance. AIP allows a diesel-electric submarine to stay submerged for astir 2 weeks, compared to boats without the strategy that indispensable aboveground oregon snorkel each fewer days to recharge batteries.In contrast, the submarines planned nether Project-75I, to beryllium built successful concern with Germany’s ThyssenKrupp Marine Systems, were designed to incorporated AIP from the outset, on with land-attack cruise missiles and different next-generation technologies, TOI reported.Sources told TOI that the determination to proceed with last techno-commercial negotiations for the six German submarines, with an enactment for 3 much astatine a aboriginal stage, followed extended deliberations involving the defence ministry, the Navy and the National Security Council Secretariat. Formal declaration negotiations began successful September 2025.“These new-generation boats nether P-75I volition travel with plan ToT (transfer of technology) and a greater indigenisation level of astir 60%.

The task volition service arsenic a span to the aboriginal P-76, nether which accepted submarines volition beryllium constructed based connected wholly indigenous design,” a root told TOI.Despite the intermission connected the Scorpene extension, officials indicated that France’s broader strategical concern with India remained strong. Negotiations progressed connected further Rafale fighters for the Indian Air Force’s projected 114 multi-role combatant craft programme, arsenic good arsenic a collaboration to co-develop a almighty pitchy motor with French large Safran for India’s fifth-generation Advanced Medium Combat Aircraft was astir finalised.At the time, the Navy’s accepted submarine spot stood astatine six Scorpenes, six ageing Russian Kilo-class boats and 4 German HDW submarines, alongside 2 nuclear-powered ballistic rocket submarines. China, by comparison, operated much than 50 diesel-electric and astir 10 atomic submarines and was successful the process of supplying 8 Yuan-class AIP-equipped submarines to Pakistan, a improvement seen arsenic a large capableness boost for Islamabad, TOI reported.

Long-term interaction connected India’s naval posture

Once inducted, the six Type-214NG submarines volition importantly heighten the Indian Navy’s capableness for covert surveillance, oversea denial and precision onslaught missions. Their sensors, weapons and endurance volition signifier a cardinal furniture of India’s maritime deterrence architecture.Equally important is the concern legacy. By absorbing precocious submarine technologies, India positions itself for aboriginal indigenous designs and follow-on projects.

MDL’s relation would beryllium strengthened, and a specialised home proviso concatenation would beryllium deepened.

Project-75I marks 1 of the astir consequential naval procurement decisions India has taken successful years. It addresses hard lessons from 1971, caller operational realities with Pakistan, and the increasing situation posed by China’s undersea expansion.As Germany’s chancellor arrives successful India, the submarine negotiations underscore however defence concern practice has go cardinal to New Delhi’s overseas policy. From Karachi’s burning docks successful 1971 to the soundless depths of the Indian Ocean today, India’s maritime strategy is being reshaped done capability, indigenisation and strategical foresight.