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The partnership between the DRDO and Larsen & Toubro marks a milestone in developing fuel cell-based AIP technology for India.

Larsen & Toubro and DRDO have signed a contract to develop two Air Independent Propulsion (AIP) system modules for Kalvari-class submarines of Indian Navy.

Larsen & Toubro said the energy modules will be integrated into the AIP plug that will be retrofitted into the Kalvari submarine

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.