Bolstering deterrence through submarine dominance
Given the changing nature of warfare, it is essential to strengthen deterrence capabilities across land, air, and sea
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Context
Following indications from the Defence Minister, India is understood to have quietly commissioned , its third nuclear-powered ballistic missile submarine (SSBN). Launched under the Arihant-class series alongside its predecessor , this 7000-tonne vessel carries an upgraded payload, including up to 24 missiles. This commissioning represents a crucial milestone in establishing a credible, continuous maritime deterrent and securing the nation's strategic underwater frontiers.
UPSC Perspectives
Polity
The commissioning of SSBNs is deeply tied to India's official nuclear doctrine, which mandates strict civilian control over atomic assets through the (NCA). The NCA comprises a Political Council, which retains the sole power to authorize a nuclear strike, ensuring democratic oversight of sensitive defense policy. Central to India's strategic posture is its doctrine (a formal pledge not to use nuclear weapons as a means of warfare unless first attacked by an adversary). This defensive posture legally and politically necessitates a robust, survivable second-strike capability (the assured ability to retaliate with devastating force after absorbing a first strike). In the event of a preemptive nuclear attack disabling land-based silos or airbases, submarines like guarantee that the political leadership can execute a retaliatory strike. By completing the maritime leg of the nuclear triad, India aligns its operational military capabilities with its politically mandated defensive doctrine.
Geographical
The maritime geography of the dictates the strategic necessity of a robust, continuous underwater fleet. Unlike terrestrial borders, the vast, deep oceanic waters provide an ideal operating environment for nuclear submarines to remain submerged and undetected for months. The geostrategic importance of the region is amplified by critical maritime choke points (narrow channels like the Malacca Strait where sea traffic can be restricted or blocked). As adversarial navies expand their footprint and secure dual-use port infrastructure across these vital maritime zones, India faces a potential geographic encirclement. Deploying SSBNs grants the nation vital strategic depth (the geographic distance between front-line vulnerabilities and core retaliatory assets). Ultimately, maintaining a dominant submarine presence allows India to project power across critical sea lanes and secure its sprawling maritime boundaries against external encroachment.
Economic
The indigenous development of naval platforms under the highly classified program represents a transformative leap for India's defense-industrial base. Historically struggling with a high import-to-GDP ratio for armaments, India is fundamentally restructuring its defense economy through indigenization (the process of developing defense capabilities domestically). Constructing complex nuclear submarines necessitates intricate, multi-sector supply chains that stimulate domestic high-tech manufacturing, precision metallurgy, and nuclear engineering. These strategic mega-projects foster deep collaborations between state research organizations and private shipbuilders, effectively transferring advanced technological know-how into the broader economy. By producing SSBNs locally, the government drastically reduces the massive foreign exchange outflow typically associated with importing warships or submarines. In the long term, this domestic defense ecosystem not only generates high-skilled technical employment but also creates a foundation for India to export allied naval components to friendly nations.