Naval Systems & Key Projects
The Indian Ocean is vast, and securing it is critical for India’s trade, energy supplies, and national security. The Indian Navy operates a massive fleet of surface ships and underwater submarines to project power and protect the nation’s maritime borders.
Submarines are the most lethal naval weapons because they operate entirely out of sight. They serve as the “silent killers” of the sea, capable of destroying enemy ships and submarines without being detected.
Must-Know Defence Terminology: Submarine Technologies
Before studying India’s specific submarine projects, it is important to understand how modern submarines are powered:
- Conventional Submarines (Diesel-Electric): These use diesel engines to charge their batteries. However, diesel engines need oxygen to run. Therefore, these submarines must come to the surface (or near the surface using a pipe called a “snorkel”) every few days to take in fresh air. When they surface, they can be easily detected by enemy radar.
- Air Independent Propulsion (AIP): This is a revolutionary technology. An AIP system allows a conventional submarine to generate electricity and charge its batteries without needing oxygen from the outside air. This means the submarine can stay hidden deep underwater for several weeks, making it incredibly stealthy and dangerous.
- Nuclear Submarines (SSN/SSBN): These are powered by a miniature nuclear reactor. They never need to surface for air and can stay underwater for months. Example: India’s INS Arihant.
