Project 77-class submarine

Patrolling by People's Liberation Army Navy ships further fast-tracked India's naval expansion programmes.

Mishra Dhatu Nigam is developing a new hull material that is expected to allow the submarine to dive to deeper depths than Arihant class.

[8] In February 2020, The Economic Times reported that the preliminary design phase of the programme has been successfully completed.

[1] As of March 2021, it was reported that the Indian Navy has prioritised the construction of Project 75 Alpha submarines over a planned third aircraft carrier.

The final clearance for the 1st Batch worth ₹40,000 crore (US$4.6 billion) is expected to be received "soon" from the Cabinet Committee on Security (CCS).

[13][14] On 9 October 2024, the CCS cleared the project worth ₹40,000 crore (US$4.6 billion) to construct 2 nuclear attack submarines for the Indian Navy.