Indian Navy eyes two new nuclear attack submarines; Key features

The initial phase of this process involves the defense ministry granting acceptance of necessity (AoN) to the Indian Navy.

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India’s SSBNs are primarily designed for nuclear deterrence and second-strike capability (X(Representative Image))

In response to escalating regional tensions and delays in its ambitious 'Project Delta', the Indian Navy is seeking government approval to enhance its submarine fleet. The delays, attributed to Russia’s ongoing conflict with Ukraine, have prompted India to propose the construction of two new nuclear-powered conventionally armed submarines (SSNs) to bolster its defense capabilities in the Indo-Pacific region.

'Project Delta', which aims to augment the Indian Navy's submarine fleet, has been postponed beyond 2027. Originally envisioned as a plan to acquire Russian Akula-class SSNs, the project has faced significant setbacks due to Russia’s preoccupation with the war in Ukraine and associated technological sanctions. These sanctions are expected to persist until at least 2028, forcing India to seek alternative solutions to strengthen its naval deterrence.

Current status of India’s submarine fleet

India’s submarine strategy, endorsed by the Modi government in 2015, involves a long-term plan to deploy six SSNs in the Indo-Pacific. Currently, the Indian Navy operates its first nuclear-powered ballistic missile submarine (SSBN), INS Arihant, which is actively patrolling the region. The second SSBN, INS Arighat, is poised for commissioning, with the third, INS Aridaman, expected to join the fleet early next year. These vessels are critical components of India’s nuclear triad, enhancing its strategic deterrence capabilities.

Strategic need for additional SSNs

The Indian Navy’s decision to pursue SSNs is driven by several strategic considerations. Unlike conventional attack submarines, SSNs offer superior operational range and speed. While conventional submarines must surface frequently for battery recharging, SSNs can operate underwater at speeds of up to 20 knots, compared to the 4-5 knots of diesel-electric submarines. This enhanced capability is crucial for maintaining a strategic edge over adversaries.

Regional tensions and emerging threats

The strategic landscape in the Indo-Pacific is increasingly competitive. China’s naval ambitions include long-range patrols in the Indian Ocean and the provision of Yuan-class SSKs to Pakistan. Last year, a Chinese Song-class submarine participated in joint exercises with Pakistan, showcasing its capabilities in a simulated attack scenario. Additionally, Bangladesh has acquired Ming-class submarines from China, further escalating regional naval dynamics.

The role of SSNs in India’s defense strategy

India’s SSBNs are primarily designed for nuclear deterrence and second-strike capability, equipped with K-15 and K-4 ballistic missiles with ranges of 750 km and 3000 km, respectively. However, SSNs play a critical role in anti-submarine warfare and strategic surveillance. They are essential for countering the presence of Chinese submarines in the Indian Ocean, particularly those using strategic routes such as the Ombai-Wetar straits.

Conclusion and next steps

The Indian Navy’s proposal to build SSNs represents a strategic move to enhance its operational capabilities and counter emerging threats. The request for approval is currently under review at the highest levels of government, with consultations ongoing to expedite the decision-making process. Convincing Defense Minister Rajnath Singh and national security planners of the urgency and necessity of this initiative will be crucial for advancing India’s naval capabilities.