Q. Which organization achieved a successful test of the Air Independent Propulsion System (AIPS) prototype in October 2023?
Answer: DRDO
Notes: The Air Independent Propulsion System (AIPS) is crucial for enhancing the stealth of non-nuclear submarines, allowing them to remain submerged without surfacing for air. The Defence Research and Development Organisation (DRDO) successfully tested a land-based prototype in October 2023. This technology can produce oxygen and electricity, supporting submarine operations and amenities while maintaining silent operation, making it a viable alternative to traditional propulsion systems.