Seaward-class defense boats

The Seaward-class defence boats are large patrol craft designed by Mazagon Dock Limited (MDL) and built by Garden Reach Shipbuilders and Engineers (GRSE) for the Indian Navy. All of these vessels have been decommissioned, due to the large maintenance overhead they require.

Class overview
NameSeaward class
BuildersGarden Reach Shipbuilders and Engineers
Operators Indian Navy
Succeeded byTrinkat class
Completed7
Retired7
General characteristics
TypeLarge Patrol Craft
Displacement210 tons full load
Length37.5 m (123 ft)
Propulsion
  • 2 × diesel motors with 6,820 hp
  • 2 shafts
Speed30 kn (56 km/h; 35 mph)
Range5,800 nmi (10,700 km; 6,700 mi) at 15 kn (28 km/h; 17 mph)
Complement32
Sensors and
processing systems		BEL 1245 surface radar
Armament
  • 2 × Bofors 40mm/60 gun
  • 1 × 7.62 mm MG
  • 18 MK 7, 10 MK 12 depth charges

Midlife refits

The ships of this class were built with low strength mild steel and thin plates, and consequently had low corrosion tolerance. As such adhering to prescribed docking intervals was essential.

INS Seaward (T54) was commissioned in September 1982. Its medium refit was due in March 1988 and its long refit in April 1992. Ignoring the vulnerability to corrosion of this ship, the medium refit was delayed by over three years and was carried out from July 1991 to April 1992. As a result, the long refit could not be planned. However, another short refit including the replacement of the engines was taken up in December 1993. The short refit was converted into a medium refit in February 1994. While carrying out repairs, extensive damage to the hull below the waterline was noticed in March 1994. The medium refit was extended to May 1996 because the engines and other materials procured for this ship were used for carrying out ongoing repairs on another, similar, ship (SDBT-55).

Ships
Name Pennant Builder Commissioned Decommissioned Status
INS Seaward T-54 GRSE September 1982 20 Jan 2006 Sunk to be made into an artificial reef
INS Seawater T-55 GRSE 2008-2009 Inactive
INS Seawind T-56 GRSE 2008-2009
INS Seawaves T-57 GRSE 24 August 2006
INS Seastorm T-58 GRSE 20 July 2010
INS Seasand T-59 GRSE 7 September 2009
INS Searock T-60 GRSE 7 September 2009
CGS Guardian T-61 GRSE April 1993 gifted to Mauritius.[1] In service[2]

References
  1. "Supply of two serviceable Main Engines to the Mauritius Police Force by the Government of India on a gratis basis". High Commission of Port Louis, Mauritius (Press release). 7 October 2011. Retrieved 9 March 2020.
  2. "The NCG to acquire high-speed crafts from foreign countries". Government of Mauritius (Press release). 12 December 2019. Retrieved 9 March 2020.
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