Island-class patrol vessel

BNS Sangu operating in the Bay of Bengal, in 2011
Class overview
Builders	Hall, Russell & Company
Operators	Bangladesh Navy (active)  Royal Navy (retired) Scottish Fisheries Protection Agency (retired) Trinidad and Tobago Coast Guard (retired) Sea Shepherd Conservation Society (retired)
Succeeded by	Castle class
In commission	1976–Present
Completed	7 (excluding FPV JURA and FPV WESTRA)
Active	5 (Bangladesh Navy)
Preserved	1
General characteristics
Type	Offshore patrol vessel
Displacement	1,000 tons (standard) 1,280 tons (full load)
Length	195 ft (59 m) (overall)
Beam	36 ft (11 m)
Draft	14 ft (4.3 m)
Propulsion	1 shaft, 2 Ruston-Paxman diesel, 4,380 hp (3,270 kW) variable-pitch propeller
Speed	16 knots (30 km/h)
Range	11,000 nautical miles (20,000 km) at 11 knots (20 km/h)
Complement	35
Sensors and processing systems	Surface Search and navigation:Kelvin Hughes Type 1006 radar Simrad RU sidescan sonar
Armament	1 × Bofors 40 mm L/60 Mark III gun, replaced by 1 × 30mm gun in some ships

The Island-class patrol vessel was first designed and built for the Scottish Fisheries Protection Agency. As a result of the Royal Navy's experiences in the Cod Wars with Iceland, FPV Jura (loaned to the Navy as HMS Jura) and FPV Westra were put in fishery protection patrols, the Navy built a further seven. These ships were designed and built by Hall Russell of Aberdeen, Scotland.