Róisín-class patrol vessel

LÉ Róisín on patrol
Class overview
Name	Róisín class
Builders	Appledore Shipbuilders, North Devon
Operators	Irish Naval Service
Preceded by	Peacock-class coastal patrol vessel
Succeeded by	Samuel Beckett-class offshore patrol vessel
In commission	15 Dec 1999–present
Planned	2
Completed	2
Active	2
General characteristics
Type	Offshore patrol vessel
Displacement	1,500 tonnes
Length	78.84 m (258.7 ft)
Beam	14 m (46 ft)
Draught	3.8 m (12 ft)
Installed power	2 × 5,000 kW (6,700 hp)
Propulsion	2 × Wartsilla medium speed diesels
Speed	15 knots (28 km/h; 17 mph) (cruising) 23 knots (43 km/h; 26 mph) (maximum)
Range	6,000 nautical miles (11,000 km; 6,900 mi) at 15 knots (28 km/h; 17 mph)
Boats & landing craft carried	2 × Delta 6.5 m (21 ft) RHIB 1 × Avon 5.4 m (18 ft) RHIB
Complement	44 (6 officers and 38 ratings)
Sensors and processing systems	Kelvin Hughes radar
Armament	1 × 76 mm Oto Melara Super Rapid 2 × 20 mm Rheinmetall cannon 2 × 12.7 mm HMG 4 × 7.62 mm GPMG
Aviation facilities	None

The Róisín-class large patrol vessel is a class of offshore patrol vessels (OPV) ^[1] ordered by the Irish Naval Service from December 1997. The first vessel is named Róisín,^[2] which is also the name given to the class. Construction on this first vessel commenced in December 1997, and it was commissioned in December 1999.The second vessel was named Niamh and delivered in 2001.^[3]

The class's primary mission is fisheries protection, search and rescue, and maritime protection operations, including vessel boardings.

Design[]

The class was designed by Vard Marine (formerly STX Canada Marine) and has an all-steel hull based on the Mauritian patrol vessel launched in 1995, but without the helicopter deck and hangar facilities. The level of automation incorporated into the ships' systems allows the ships in the class to be operated with just 44 crew including 6 officers. The class is designed for winter North Atlantic operations.

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