LÉ Róisín

History
Ireland
NameRóisín
NamesakeRóisín Dúbh, daughter of Red Hugh O’Neill
BuilderAppledore Shipbuilders, North Devon
Commissioned15 December 1999
HomeportHaulbowline Naval Base
Identification
Status"Operational reserve" as of January 2023
General characteristics
Class & typeRóisín-class offshore patrol vessel
Displacement1,500 tonnes Standard
Length78.84 m (258 ft 8 in) overall
Beam14.00 m (45 ft 11 in)
Draught3.8 m (12 ft 6 in)
Installed power10,000 kW (13,000 hp)
PropulsionWärtsilä medium speed diesels
Speed42.6 km/h (23.0 kn) maximum
Range11,000 km (6,000 nmi)
Boats & landing
craft carried
  • 2 Delta 6.5 m (21 ft 4 in) RHIBs
  • 1 Avon 5.4 m (17 ft 9 in) RHIB
Complement44 (6 officers and 38 ratings)
Sensors &
processing systems
kelvin Hughes radar
Armament
  • 1 × 76 mm OTO Melara Cannon
  • 2 × 20 mm Rheinmetall Rh202 cannon
  • 2 × 12.7 mm HMG
  • 4 × 7.62 mm GPMG
Aviation facilitiesNone

Róisín (P51) is the lead ship of her class of offshore patrol vessel in the Irish Naval Service. Commissioned in 1999, the ship's primary mission is fisheries protection, search and rescue, and maritime protection operations, including vessel boardings. Róisín or Róisín Dubh, is often used as an allegory for Ireland. However, the original Róisín Dubh was a daughter of Red Hugh O’Neill, Earl of Tyrone in the late 16th century.