Air Independent Propulsion system
Air Independent Propulsion (AIP) system minimises the dependence of diesel powered submarines on surface air while recharging its batteries. It helps eliminates the need for frequent snorkelling and increases the stealth of the submarines. DRDO has recently achieved a new milestone by improving the efficiency of the land-based prototype of AIP. Developed by the Naval Materials Research Laboratory (NMRL) of DRDO, the fuel cell-based AIP is capable of generating hydrogen onboard.