S-2.

The article discusses the S-2 nuclear-powered ballistic missile submarine, or INS Arihant, completed in 2009 by India as part of the Advanced Technology Vessel project of the Indian Navy. The impact of this nuclear weapons delivery system on the Indian Ocean region, and especially Pakistan, is discussed, as are the nuclear policies of India and Pakistan, and Pakistan's options for responding to India's seaborne capability. Options for the Pakistani Navy to deploy nuclear weapons at sea are discussed in particular.