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The vessels in this series are 20 meters (65 ft 7 in) long with a beam of 5.8 meters (19 ft 0 in) and are armed with single 7.62 mm machine gun.
They are powered by two Deutz-MWM TBD 234 V12 diesel engines (823 bhp, 614 kW each) and one Deutz-MWM TBD 234 V8 550 bhp (410 kW) diesel engine driving three Hamilton 402-series water-jet, 2,200 bhp (1,600 kW). Initially 10 vessels were ordered in September 1990 with an option for 6 more, however the option was never invoked. They were built in cooperation with Sea King industries. Glass-reinforced plastic hulls were laid up by Anderson Marine, employing molds originally built by M/s Watercraft Marine, Shoreham, UK for the Royal NavyArcher class (P-2000).
In order to meet the speed and performance requirements, vessels were configured in a triple-engine water jet arrangement and the machinery, superstructure and deck arrangement were redesigned by Amgram Ltd, Sussex, UK. The vessels were originally to have had a 20 mm Oerlikon AA forward but a remotely controlled 7.63 mm machine gun has been substituted.
Role
The vessels are intended for patrolling the coast, interdiction of smugglers and infiltrators, and search and rescue operations. The AMPL class interceptors have a complement of 1 officer and 11 sailors. They have a range 600 nmi (1,100 km) at 15 knots (28 km/h; 17 mph). The vessels have been based at various Indian coast guard station such as Mandapam, Mangalore, Visakhapatnam, Okha, Chennai, Kochi and Goa, and one boat was leased to Mauritius in 2001.