NAVAL • PRODUCTION

S4 & S5 Strategic SSBN (Ballistic Missile Submarines)

Lead Agency: ATV Project / Indian Navy / DRDO / BARC • Service: Indian Navy • Budget: ₹50,000 Cr • IDDM: 85%

Strategic Overview

Second-strike nuclear triad deterrent submarines capable of launching K-4 (3500 km) and K-5 (5000 km) submarine-launched ballistic missiles.

Strategic Ballistic Missile Submarine Flotilla ("Arihant Class Nuclear Triad") — INS Varsha, Rambilli, Andhra Pradesh (Strategic Forces Command (SFC) / Naval Operational HQ) — Status: operational
PIB: Raksha Mantri Commissions Second SSBN INS Arighat at Visakhapatnam (PIB Press Release)