GS3 · Security24 Oct 2026 · PIB
Indian Navy's underwater prowess boosted as AIP system's Phase-2 trials kick off
The Air Independent Propulsion (AIP) system developed indigenously by Naval Materials Research Laboratory, DRDO has achieved a significant milestone with the inauguration of the Setting to Work Phase (STW)-2 activity. The AIP system boosts the underwater endurance of the diesel-electric submarines by reducing its dependence on atmospheric oxygen. The system is being developed under the Setting to Work Phase (STW)-2 activity and is expected to be integrated on Kalvari-class Submarine in early 2027.
Quick Revision
Prelims-testable facts
- 01The Air Independent Propulsion (AIP) system is being developed indigenously by Naval Materials Research Laboratory, DRDO.
- 02The AIP system boosts the underwater endurance of diesel-electric submarines by reducing their dependence on atmospheric oxygen.
- 03The AIP system is being developed for integration on Kalvari-class submarines in the Indian Navy.
- 04The Setting to Work Phase-2 activity of the AIP system was inaugurated on October 24, 2026, at Larsen and Toubro's AM Naik Heavy Engineering Complex in Hazira, Gujarat.
- 05The AIP Energy Module will be energised for power production and tested rigorously before being handed over to Mazagon Dock Shipbuilders Limited for integration.
- 06The DRDO Chairman, Shri Rajesh Kumar Singh, was the Chief Guest at the inauguration ceremony of the Setting to Work Phase-2 activity.
- 07The AIP system is expected to be inducted into the Indian Navy by early 2027, following successful integration and testing.
- 08The AIP system is being developed with the cooperation of the Indian Navy, who will test and validate the system at every stage of the trials.
Trap alerts
- Most people think the AIP system is a new technology, but actually it is an indigenously developed system.
- Most people think the AIP system is only for nuclear-powered submarines, but actually it is being developed for diesel-electric submarines.
Prelims Practice MCQs
Single facteasy
On which date was the Setting to Work Phase-2 Activity of the AIP system Energy Module inaugurated?
- A.23 October 2026
- B.24 October 2026
- C.25 October 2026
- D.26 October 2026
The Setting to Work Phase-2 Activity of the AIP system Energy Module was inaugurated on 24 October 2026. This marks a key milestone in the development of the indigenous AIP system for Indian Navy's diesel-electric submarines.
Statement I & IIhard
Consider the following two statements:
Statement-I: The AIP system is being developed under the Setting to Work Phase (STW)-2 activity.
Statement-II: The AIP system is being developed under the Setting to Work Phase-2 activity.
Which one of the following is correct in respect of the above statements?
- A.Both Statement-I and Statement-II are correct and Statement-II is the correct explanation for Statement-I
- B.Both Statement-I and Statement-II are correct but Statement-II is not the correct explanation for Statement-I
- C.Statement-I is correct but Statement-II is incorrect
- D.Statement-I is incorrect but Statement-II is correct
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