Viana do Castelo-class patrol vessel

	NRP Viana do Castelo
Class overview
Builders	Estaleiros Navais de Viana do Castelo (ENVC) and West Sea Shipyard
Operators	Portuguese Navy
Preceded by	João Coutinho-class corvette
Subclasses	NPO - ocean patrol vessel NCP - anti-pollution vessel
In commission	2010 - Present
Planned	10 OPV
Completed	4
Cancelled	0
Active	4
General characteristics
Type	Offshore patrol vessel
Displacement	1,850 tons
Length	83.10 m (272 ft 8 in)
Beam	12.95 m (42 ft 6 in)
Draught	3.82 m (12 ft 6 in)
Propulsion	2 x Wärtsilä diesel engines (3,900 kW (5,200 hp) each), 2 electric engines (200 kW (270 hp) each)
Speed	21 knots (39 km/h; 24 mph) maximum
Boats & landing ; craft carried	2 x Rigid Inflatable Boats
Complement	35 accommodation for 32 more
Sensors and ; processing systems	Leonardo Medusa MK4/B electro-optical fire control system, Electro-optical SAGEM / VIGY, 2x KH Manta2000 navigation radar, iXblue Quadrans inertial navigation system, Furuno Electric's FAR-3230 F-band, FAR-3220 I-band navigation radars
Armament	1 × 30 mm Oto Melara Marlin WS; 2 × M2 Browning machine gun; 2 x MG 3 machine gun;
Aviation facilities	Medium-sized helicopter pad but no hangar supporting Super Lynx Mk.95
Notes	Anti-pollution version (NCP); System for recovery and transfer of pollutants spilled on the ocean.; Barrier launcher.; 2 × Floating tank of "Unibag" type, of 50 m3 each.; 1 × Internal coil of vapor circulation, to allow the heating of the existing pollutant products inside of the tanks, to facilitate their extraction.;

The Viana do Castelo class is a class of offshore patrol vessels planned by and for the Portuguese Navy, as a result of the NPO2000 Project (Portuguese, Navios de Patrulha Oceânica, for Oceanic Patrol Vessels), that are being constructed in the West Sea Shipyard.

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