New Delhi (India), Oct. 30 -- : The Defence Research and Development Organisation (DRDO) programme to build a fuel cell-based Air Independent Propulsion (AIP) system for Indian Naval Submarines has crossed several milestones in technology maturity.

"Air Independent Propulsion (AIP) has a force multiplier effect on the lethality of a diesel-electric submarine as it enhances the submerged endurance of the boat, several folds. Fuel cell-based AIP has merits in performance compared to other technologies," said a government press release.

Operation of the land-based prototype engineered to the form-and-fit of a submarine was witnessed by Chief of the Naval Staff Admiral Karambir Singh in the presence of Secretary, Department of Defence R&D and...