The Seaward Defence Boats are large patrol craft designed by Mazagon Dock Limited (MDL) and built by Garden Reach Shipbuilders and Engineers

Garden Reach Shipbuilders and Engineers

Garden Reach Shipbuilders & Engineers Limited is one of India's leading shipyards, located in Kolkata, West Bengal. It builds and repairs commercial and navals vessels....

 (GRSE) for the Indian Navy

Indian Navy

The Indian Navy is the naval branch of the armed forces of India. The President of India serves as the Commander-in-Chief of the Navy. The Chief of Naval Staff , usually a four-star officer in the rank of Admiral, commands the Navy...

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Most of these vessels have been decommissioned, due to the large maintenance overhead they required.

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	Status
INS Seaward	T-54	GRSE Garden Reach Shipbuilders and Engineers Garden Reach Shipbuilders & Engineers Limited is one of India's leading shipyards, located in Kolkata, West Bengal. It builds and repairs commercial and navals vessels....	September 1982	Decommissioned; Sunk to be made into an artificial reef
INS Seawater	T-55	GRSE Garden Reach Shipbuilders and Engineers Garden Reach Shipbuilders & Engineers Limited is one of India's leading shipyards, located in Kolkata, West Bengal. It builds and repairs commercial and navals vessels....		Decommissioned in 2008-2009
INS Seawind	T-56	GRSE Garden Reach Shipbuilders and Engineers Garden Reach Shipbuilders & Engineers Limited is one of India's leading shipyards, located in Kolkata, West Bengal. It builds and repairs commercial and navals vessels....		Decommissioned in 2008-2009
INS Seawaves	T-57	GRSE Garden Reach Shipbuilders and Engineers Garden Reach Shipbuilders & Engineers Limited is one of India's leading shipyards, located in Kolkata, West Bengal. It builds and repairs commercial and navals vessels....		Active
INS Seastorm	T-58	GRSE Garden Reach Shipbuilders and Engineers Garden Reach Shipbuilders & Engineers Limited is one of India's leading shipyards, located in Kolkata, West Bengal. It builds and repairs commercial and navals vessels....		Decommissioned on 20 Jul 2010
INS Seasand	T-59	GRSE Garden Reach Shipbuilders and Engineers Garden Reach Shipbuilders & Engineers Limited is one of India's leading shipyards, located in Kolkata, West Bengal. It builds and repairs commercial and navals vessels....		Decommissioned on 07 Sept 2009
INS Searock	T-60	GRSE Garden Reach Shipbuilders and Engineers Garden Reach Shipbuilders & Engineers Limited is one of India's leading shipyards, located in Kolkata, West Bengal. It builds and repairs commercial and navals vessels....		Decommissioned on 07 Sept 2009