SSBNs

New Delhi, Jan 25: India's effort to modernise its submarine force is set to take a giant leap with the fitment of the home-grown Air Independent Propulsion (AIP) system, developed by the Defence Research Development Organisation (DRDO), in INS Kalvari. Equipped with AIP technology, the Kalvari will be able to stay underwater for a long time, significantly adding to its lethality. Once it is modernised, the Kalvari, a variant of the French Scorpeen sub, will no longer have to frequently surface for refuelling-a time when the platforms can be picked and attacked. The development also showcases India-France strategic partnership, as…