INS Arighaat — Arihant-Class SSBN

APPROVED

Second Arihant-class nuclear-powered ballistic missile submarine commissioned in 2024

Budget

Classified

Timeline

2024

Sector

Indian Navy

Indigenisation

85%

PROCUREMENT TIMELINE

AON

Acceptance of Necessity — CCS/DAC approves the requirement.

RFI

Request for Information — industry capability survey.

RFP

Request for Proposal — detailed tender issued to vendors.

ToC

Transfer of Technology clause negotiations.

CNC

Contract Negotiation Committee finalises terms.

Contract

Contract signed with selected vendor(s).

Dev/Trial

Development, integration and user trials.

Induction

CURRENT

Equipment inducted into service.

INTEL SIGNALS

Budget classified — strategic program

Strategic priority designation

PIB/Wikipedia record INS Arighaat as the second Arihant-class SSBN, commissioned at Visakhapatnam on 29 Aug 2024 in the presence of the Raksha Mantri. Treat as inducted strategic-deterrent capability; technical payload details remain sensitive and should not be over-specified beyond open-source reporting.

RECENT INTELLIGENCE

India conducts second K-4 missile test from INS Arighaat nuclear submarine in Bay of Bengal - Defence Industry Europe

news.google.com · 01 Jan 2026

India Successfully Tests K 4 Submarine Launched Ballistic Missile from INS Arighaat Strengthening Nuclear Triad - LawStreet Journal

news.google.com · 26 Dec 2025

Hidden, silent, lethal: Why the K-4 missile launch from INS Arighaat matters for India’s nuclear triad - Business Today

news.google.com · 25 Dec 2025

India Tests K-4 Long-Range Nuclear Missile From Newly Commissioned INS Arighaat Submarine - Army Recognition

news.google.com · 26 Dec 2025

India Strengthens Undersea Nuclear Deterrence with K-4 Missile Test from INS Arighaat - Dainik Jagran MP CG

news.google.com · 25 Dec 2025

CONTENDERS / VENDORS

Ship Building Centre Visakhapatnam · DRDO · BARC · Indian Navy

LATEST UPDATES

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