In such a situation, India needs such submarines inside the sea, which can make India invincible on the sea. This is the reason why India is now using Air Independent Propulsion (AIP) technology ...

HS Papanikolis , the oldest of the Hellenic Navy's four Type 214 submarines set to be modernised ... for the modernisation of its four air-independent propulsion (AIP)-equipped Papanikolis ...

The AIP system is vital for Indian Navy to keep vessels underwater for longer periods and enable submarine fleet to have bigger vessels with more advanced capabilities. Indian Navy Announces 300 ...

the S-BR submarine is not equipped with an air-independent propulsion (AIP) system which allows a submarine to operate without the need to surface or use a snorkel to access atmospheric oxygen.

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 ...