India has formally started negotiations with Germany’s ThyssenKrupp Marine Systems (TKMS) and Mazagon Dock Shipbuilders Limited (MDL) for the construction of six advanced submarines under Project-75 India. The deal, estimated at ₹70,000 crore, represents one of the largest defence contracts in India’s naval history.

The submarines will feature Air Independent Propulsion (AIP) systems, allowing them to remain submerged for up to three weeks without surfacing. Built domestically in partnership with MDL, the project is expected to significantly boost India’s indigenous defence manufacturing capabilities and reduce reliance on imports. The advanced technology will also enhance the Indian Navy’s ability to secure maritime interests in the Indo-Pacific region.

Negotiations are expected to be completed within six months, after which the contract will be finalized. The project is part of India’s long-term plan to modernize its naval fleet and strengthen deterrence in light of increasing regional security challenges. Defence analysts view this as a strategic milestone that will add depth and endurance to India’s undersea warfare capabilities while creating thousands of jobs in the domestic shipbuilding sector.