View source for Róisín-class patrol vessel

{|{{Infobox ship begin}}

{{Infobox ship image
| Ship image=LE ROISIN P51.jpg
| Ship caption= LÉ ''Róisín'' on patrol
}}
{{Infobox ship class overview
|Name=''Róisín'' class 
|Builders=[[Appledore Shipbuilders]], [[North Devon]]
|Operators={{flagicon|Ireland}} [[Irish Naval Service]]
|Class before={{sclass|Peacock|corvette|4}}
|Class after={{sclass|Samuel Beckett|offshore patrol vessel|4}}
|Subclasses=
|Cost=
|Built range=
|In service range= 
|In commission range=1999–present
|Total ships building=
|Total ships planned=2
|Total ships completed=2
|Total ships cancelled=
|Total ships active=0
|Total ships laid up=2 ({{as of|2023|02|lc=y}})<ref>{{cite web|url = https://www.janes.com/defence-news/news-detail/irish-naval-service-opts-to-mothball-roisin-class-opvs-due-to-manning-issues | website = janes.com | title = Irish Naval Service opts to mothball Roisin-class OPVs due to manning issues | date = 3 February 2023 | accessdate = 4 February 2023 }}</ref>
|Total ships lost=
|Total ships retired=
|Total ships preserved=
}}
{{Infobox ship characteristics
|Hide header=
|Header caption= 
|Ship type=[[Patrol boat|Offshore patrol vessel]] 
|Ship displacement={{cvt|1500|t|LT|lk=on}}
|Ship length={{convert|78.84|m|ftin|abbr=on}}
|Ship beam={{convert|14|m|ftin|abbr=on}}
|Ship height=
|Ship draught={{convert|3.8|m|ftin|abbr=on}}
|Ship power=2 × {{convert|5,000|kW|abbr=on}}
|Ship propulsion=2 × Wärtsilä medium speed diesels
|Ship speed={{convert|23|kn|lk=in}} (maximum)
|Ship range={{cvt|6,000|nmi}} at {{convert|15|kn}}
|Ship endurance=
|Ship boats=*2 × Delta {{convert|6.5|m|abbr=on}} RHIB
*1 × Avon {{convert|5.4|m|abbr=on}} RHIB
|Ship capacity=
|Ship complement=44 (6 officers and 38 ratings)
|Ship sensors=Kelvin Hughes radar
|Ship EW=
|Ship armament=*1 × [[OTO Melara 76 mm|76 mm OTO Melara]] Super Rapid
*2 × [[Rheinmetall Mk 20 Rh-202|20 mm Rheinmetall cannon]]
*2 × 12.7 mm  [[Heavy machine gun|HMG]]
*4 × 7.62 mm [[GPMG]]
|Ship aircraft=
|Ship aircraft facilities=
|Ship notes=
}}
|}
The '''''Róisín''-class large patrol vessel''' is a class of [[patrol boat|offshore patrol vessels]] (OPV) <ref>{{cite web|url=http://www.naval-technology.com/projects/roisin/|title=Róisín class|publisher=naval-technology.com}}</ref> ordered by the [[Naval Service (Ireland)|Irish Naval Service]] from December 1997. The first vessel is named {{LÉ|Róisín|P51|2}},<ref>{{cite web|url=http://www.military.ie/naval-service/fleet/large-patrol-vessel/le-roisin-p-51/|title=L.É. Róisín P51|publisher=military.ie}}</ref> 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 {{LÉ|Niamh|P52|2}} and delivered in 2001.<ref>{{cite web|url=http://www.military.ie/naval-service/fleet/large-patrol-vessel/le-niamh-p-52/|title=L.É. Niamh P52|publisher=military.ie}}</ref>

The class's primary mission is [[fisheries protection]], [[search and rescue]], and maritime protection operations, including vessel [[boarding (attack)|boardings]].

==Design==
The class was designed by Vard Marine (formerly STX Canada Marine) and has an all-steel hull based on the [[Mauritius|Mauritian]] patrol vessel {{ship|MCGS|Vigilant||2}} 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.

==Names==
{|class="wikitable"
|- bgcolor="#efefef"
! Name
! Pennant number
! Builder
! Laid down
! Commissioned 
! Status
|-
| {{LÉ|Róisín|P51|2}}
| P51
| rowspan=2|[[Appledore Shipbuilders]], [[North Devon]]
| December 1997
| 15 December 1999
| rowspan=2 | "Operational reserve" (as of January 2023)<ref name="journal2023">{{cite web|url = https://www.thejournal.ie/navy-ships-tied-up-roisin-niamh-5978870-Jan2023/ | website = thejournal.ie | publisher = Journal Media Ltd | title = Two naval ships to be tied up as staffing crisis deepens in Irish Navy | date = 25 January 2023 | accessdate = 29 January 2023 |first = Niall |last = O'Connor }}</ref>
|-
| {{LÉ|Niamh|P52|2}}
| P52
| April 2000
| 18 September 2001
|-
|}

==References==
{{reflist}}

{{DEFAULTSORT:Roisin class OPV}}
[[Category:Patrol vessels of the Irish Naval Service]]
[[Category:Patrol ship classes]]
[[Category:Róisín-class offshore patrol vessels| ]]