23 October 2026
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Game-Changer for Indian Navy: Rajnath Singh Lays Foundation of Advanced Large Cavitation Tunnel at DRDO’s NSTL

India takes a major step in defence self-reliance with the Large Cavitation Tunnel at NSTL Visakhapatnam, enhancing naval research, stealth technology, and indigenous testing capabilities.
Indigenous Large Cavitation Tunnel
Indian Masterminds Stories

Vishakhapatnam: India has taken a major step towards strengthening its naval strength with the Large Cavitation Tunnel project. Defence Minister Rajnath Singh laid the foundation stone of this advanced facility at Naval Science and Technological Laboratory (NSTL) in Visakhapatnam. The Large Cavitation Tunnel will improve India’s ability to design, develop, and test naval systems within the country. 

This initiative is expected to reduce dependence on foreign testing facilities and boost self-reliance in defence technology.

What is the Indigenous Large Cavitation Tunnel 

The Large Cavitation Tunnel (LCT) is a high-tech testing facility designed for advanced naval research.

  • It will help study water flow, propulsion systems, and cavitation effects.
  • It supports both submarine and surface ship testing in one integrated system.
  • It is planned as a strategic national asset for hydrodynamic research.

Read also: How the Indian Navy Indigenous 30mm Naval Gun Will Strengthen India’s Fleet Against UAVs and Asymmetric Threats

Once operational, the facility will allow precise testing of ships, submarines, destroyers, and aircraft carriers.

What is the Importance of Indigenous Large Cavitation Tunnel 

1. Boost to Indigenous Defence Capabilities

India will now be able to design, develop, and test naval equipment locally without depending on foreign countries.

2. Strengthening Naval Power

The project will help India become a strong naval power and leader in defence technology.

3. Better Stealth & Propulsion Systems

  • Improves noise reduction technologies
  • Enhances stealth capabilities of submarines and ships
  • Supports advanced propulsion system development

Role of NSTL in Defence Research

The Naval Science & Technological Laboratory (NSTL) is a key DRDO lab focused on underwater defence systems.

  • Works on torpedoes, naval mines, and underwater vehicles
  • Develops stealth and hydrodynamic technologies
  • Supports Indian Navy’s modernization efforts

During the visit, advanced systems like torpedoes, autonomous underwater vehicles (AUVs), and swarm technologies were demonstrated.

Official Statement of Rajnath Singh 

The Defence Minister highlighted that:

  • Earlier, India had to depend on foreign facilities for critical testing
  • This new project will change that situation completely
  • It will act as a foundation for future submarines and naval systems

He also linked the project with the vision of Narendra Modi’s Aatmanirbhar Bharat, emphasizing self-reliance in defence.

Advanced Features of the Indigenous Large Cavitation Tunnel 

  • Combined closed-loop and free surface simulation systems
  • Supports next-generation naval platforms
  • Helps validate hydrodynamic designs accurately
  • Built with international collaboration and Indian innovation

What is the Impact of Indigenous Large Cavitation Tunnel 

This facility will:

  • Strengthen India’s shipbuilding ecosystem
  • Improve combat readiness of naval forces
  • Support development of next-gen underwater warfare systems
  • Increase confidence of Indian Navy personnel at sea

Read also: Indian Navy Inducts Malwan ASW SWC: Key Features, Role and Strategic Importance Explained


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