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P77 SSN

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Strategic Priority Program

Indian Navy › Procurement

Project 77 — Nuclear Attack Submarine (SSN)

APPROVED

Planned indigenous SSN class for Indian Navy under long-horizon force development

Budget

Classified / programme estimate undisclosed

Timeline

2024–2040+

Sector

Indian Navy

Indigenisation

70%

PROCUREMENT TIMELINE

AON

AON

CURRENT

Acceptance of Necessity — CCS/DAC approves the requirement.

RFI

RFI

RFP

RFP

ToC

ToC

CNC

CNC

Contract

Contract

Dev/Trial

Dev/Trial

Induction

Induction

INTEL SIGNALS

Budget classified — strategic program

Strategic priority designation

Open reporting indicates the CCS approved construction of the first 2 SSNs under Project 77 in October 2024, with a broader long-term SSN force plan beyond the initial tranche. Detailed technical and contractual breakdowns remain limited in public domain disclosures, so this entry remains conservative on timelines and subsystem specifics.

CONTENDERS / VENDORS

Indian Navy · Ship Building Centre (Vizag) · L&T

LATEST UPDATES

  • No updates published yet.

SEE ALSO

P-75I6 AIP-equipped diesel-electric attack submarines
ACTIVE
P-76Indian Navy indigenous diesel-electric attack submarine programme with AIP and high local content
PENDING
INS ArighaatSecond Arihant-class nuclear-powered ballistic missile submarine commissioned in 2024
APPROVED