Introduction
The Arnala class is a class of Anti-Submarine Warfare Shallow Water Craft (ASW-SWC) being inducted into the Indian Navy. Designed and built in India, these vessels are intended to detect, track and neutralise enemy submarines operating in coastal and shallow waters, thereby strengthening India’s coastal defence and maritime security.
Background
- Developed under the Anti-Submarine Warfare Shallow Water Craft (ASW-SWC) Project.
- Built by Garden Reach Shipbuilders & Engineers (GRSE), Kolkata, in partnership with Larsen & Toubro (L&T).
- A total of 16 vessels are being constructed for the Indian Navy.
- The class is named after INS Arnala, the lead ship, named after the historic Arnala Fort in Maharashtra.
Key Features
- Designed primarily for anti-submarine warfare in shallow coastal waters.
- High indigenous content in line with the Aatmanirbhar Bharat initiative.
- Equipped with advanced sonar, surveillance and underwater detection systems.
- Capable of conducting mine-laying, low-intensity maritime operations, search and rescue, and coastal patrols.
- Features a Waterjet propulsion system for enhanced manoeuvrability in shallow waters.
Technical Specifications
- Class: Anti-Submarine Warfare Shallow Water Craft (ASW-SWC)
- Displacement: Approximately 1,490 tonnes
- Length: About 77.6 metres
- Maximum Speed: Around 25 knots
- Endurance: Approximately 1,800 nautical miles
- Crew: Around 57 personnel
Armament and Capabilities
- Lightweight anti-submarine torpedoes.
- Rocket launchers for anti-submarine warfare.
- 30 mm Naval Gun for self-defence.
- Advanced hull-mounted sonar and other underwater sensors.
- Electronic warfare and communication systems.
- Mine-laying capability.
- Search and Rescue (SAR) and maritime interdiction operations.
Significance
Strengthening Coastal Defence
Enhances the Indian Navy’s capability to detect and neutralise submarine threats in littoral and shallow-water environments.
Maritime Security
Improves surveillance and protection of India’s coastline, ports and critical offshore assets.
Aatmanirbhar Bharat
Promotes indigenous shipbuilding and strengthens India’s defence industrial base through high domestic content.
Force Multiplication
Complements larger frontline warships by undertaking specialised anti-submarine operations in coastal waters.
Recent Developments
- INS Arnala, the lead ship of the class, was commissioned into the Indian Navy on 18 June 2025.
- The remaining 15 ASW-SWC vessels are at various stages of construction and trials and will be inducted in phases.
Way Forward
- Complete the induction of all 16 ASW-SWC vessels on schedule.
- Integrate next-generation sonar, unmanned underwater vehicles (UUVs) and AI-enabled underwater surveillance systems.
- Strengthen indigenous development of anti-submarine weapons and sensors.
- Enhance coordination with maritime patrol aircraft and helicopters for layered anti-submarine defence.
Conclusion
The Arnala-class represents a significant advancement in the Indian Navy’s anti-submarine warfare capability. With its specialised design for shallow-water operations, modern sensors and high indigenous content, the class will play a crucial role in safeguarding India’s coastal waters and strengthening maritime security in the Indian Ocean Region.
