Anti-Submarine Warfare Shallow Water Craft

The Anti-Submarine Warfare Shallow Water Craft (ASW-SWC) corvettes, are a class of anti-submarine warfare (ASW) vessels currently being built for the Indian Navy, by Cochin Shipyard (CSL) and Garden Reach Shipbuilders & Engineers (GRSE). They were conceived as a replacement to the ageing Abhay-class corvettes of the Indian Navy, and are designed to undertake ASW duties – including subsurface surveillance in littoral waters, search-and-attack unit (SAU) missions and coordinated anti-submarine warfare operations with naval aircraft. They were also designed to provide secondary duties – including defense against intruding aircraft, minelaying and search-and-rescue (SAR).

Androth, photographed on the day of her launch.
Class overview
NameAnti-Submarine Warfare Shallow Water Craft (ASW-SWC)
Builders
Operators Indian Navy
Preceded by
Succeeded byNext Generation Missile Vessels
Cost
  • 12,622 crore (equivalent to 150 billion or US$1.9 billion in 2023) for 16 ships (FY 2020)
  • 789 crore (equivalent to 929 crore or US$120 million in 2023) per ship (FY 2020)
Built2021-present
Planned16
Building15
Active0
General characteristics
TypeCorvette
Displacement
  • GRSE :900 tons
  • CSL :700 tons
Length
  • GRSE :77.6 metres (255 ft)
  • CSL :78 metres (256 ft)
Beam
  • GRSE :10.5 metres (34 ft)
  • CSL :11.26 metres (36.9 ft)
DraughtGRSE : 2.7 metres (8.9 ft)
PropulsionWater-jet propulsion
Speed25 knots (46 km/h)
Range1,800 nautical miles (3,300 km) (at 14 knots (26 km/h)
Complement57 (7 officers + 50 sailors)
Sensors and
processing systems
  • Combat Suite:
  • ASW Combat Suite (presumably the DRDO-developed IAC MOD 'C' combat suite)
  • Sonar:
  • Hull-Mounted Sonar (HMS)
  • Low Frequency Variable Depth Sonar (LFVDS)
  • Management Systems:
  • Fire Control System (FCS)
  • Integrated Platform Management System (IPMS)
  • Automatic Power Management System (APMS)
  • Battle Damage Control System (BDCS)
Armament
  • Anti-Submarine Warfare:
  • 1 x RBU-6000 anti-submarine rocket launcher
  • 6 × Lightweight ASW Torpedo (presumably the Advanced Light Weight Torpedo (ALWT))
  • Anti-submarine mines (launched from mine-laying rails)
  • Guns:
  • 1 X CRN-91 30mm naval gun
  • 2 x OFT 12.7 mm M2 Stabilized Remote Controlled Gun
NotesLargest waterjet-powered vessels in the Indian Navy.

Equipped with sophisticated sensors and ordnance, the vessels also possess the capabilities to interdict and destroy subsurface targets – primarily hostile submarines, within the vicinity of coastal waters. A total of 16 vessels are being built for the Indian Navy, jointly by CSL and GRSE under the Make in India initiative. The Indian Navy plans to have all 16 vessels in active service by 2026.

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