Initial Operational Capability (IOC): 1999
Total Production: 2
Origin: United Kingdom
Parent System: Roisin
Initial Operational Capability (IOC): 1999
Total Production: 2
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Description: The Roisin class offshore patrol vessels (OPVs) were designed and built in the United Kingdom by Appledore SB shipyards for the Navy of Ireland in the late 1990s. The 1,700-ton class ship's propulsion system features four diesel engines developing 11,780-bhp and a top speed of 22 knots. The weapon system includes an OTO 76mm dual purpose gun and two 7.62mm machine guns. Ireland commissioned two Roisin offshore patrol vessels in 1999 and 2001.

Roisin Specifications

Crew: 57
Number of Engines: 4
Beam: 14 meter (46 foot)
Draft: 3.95 meter (13.0 foot)
Length: 79 meter (259 foot)
Main Gun Caliber: 76 millimeter
Total Combined Power: 11,780 shp (8,788 kW)
Top Speed: 22 knot (41 kph)
Full Displacement: 1,700 ton
CEP: Circular Error Probable
Meters (m)   Kilometers (km)   Nautic Miles (nm)   Inch (in)   Yard (yd)   Foot (ft)   Millimeter (mm)
Pound (lb)   Kilogram (kg)   kN (KiloNewton)   Ton (t)
Meters per Second (mps)   Kilometers per Hour (kph)   Knot (kt)   Miles per Hour (mph)
Liter (l)   Galon (gl)
Year (yr)   Minutes (min)   Second (sec)
Shaft-Horse-Power (shp)

Operators & Related Equipment


Grand Total 21
Cannons & Gear
76/62 Compactx1

Roisin Ship Listing

SerialNameStatusLaunch DateCommissionDecommission
P51 Roisin-1999-
P52 Niamh-2001-

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