Context: Larsen & Toubro (L&T) and the Defence Research and Development Organisation (DRDO) signed a contract for realisation of two Air Independent Propulsion (AIP) System Modules for the Kalvari Class of submarines of the Indian Navy. About Air Independent Propulsion:
News Source: The Hindu
- AIP technology allows a conventional submarine to remain submerged for much longer than ordinary diesel-electric submarines.
- AIP has a force multiplier effect on lethality of a diesel electric submarine as it enhances the submerged endurance of the boat several folds.
- Improved stealth capacity:
- All conventional submarines have to surface to run their generators that recharge the batteries that allow the boat to function under water.
- However, the more frequently a submarine surfaces, the higher the chances of it being detected.
- AIP allows a submarine to remain submerged for more than a fortnight, compared to two to three days for diesel-electric boats.
- Indigenization of AIP:
- DRDO had achieved an important milestone in the development of Air Independent Propulsion (AIP) System by proving the land-based prototype.
- India is developing AIP based on fuel cells. These cells convert chemical energy into electrical energy, recharging the batteries of the submarine.
- Around 10 countries have developed or are close to building AIP technology, and almost 20 nations have AIP submarines.
About Kalvari-class Submarine: