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India's L&T and DRDO have inked a contract to upgrade an Indian Navy Kalvari class submarine with 2 Air Independent Propulsion System modules

On realisation and integration of these modules in the submarines, India will join an elite club of a handful of nations who have indigenously developed fuel cell based submarine AIP technology which is critical for increasing the endurance of conventional submarines, according to a press release from L&T

Larsen & Toubro (L&T) and the Defence Research and Development Organisation (DRDO) have signed a contract to provide two Air Independent Propulsion (AIP) System Modules for the Indian Navy's Kalvari Class submarines. The AIP Modules will be manufactured, integrated and undergo factory acceptance trials in L&T's AM Naik Heavy Engineering Complex at Surat. The technology produces the power required and also generates hydrogen on-board, which eliminates the need to carry it, making it safer for the submarine.

Indian engineering firm Larsen & Toubro (L&T) has signed a contract with the country's Defence Research and Development Organisation (DRDO) to produce two Air Independent Propulsion System Modules for the Indian Navy's Kalvari Class submarines.

The technology of this indigenous AIP system is a unique one that generates hydrogen on demand thereby obviating the need for carrying hydrogen onboard which is a major safety concern for a submarine.