|
History
|
Ireland
|
Name
| LE
Roisin
|
Namesake
| Roisin Dubh, daughter of
Red Hugh O’Neill
|
Builder
| Appledore Shipbuilders
,
North Devon
|
Commissioned
| 15 December 1999
|
Homeport
| Haulbowline Naval Base
|
Identification
| |
Status
| "Operational reserve" as of January 2023
[update]
[1]
|
General characteristics
|
Class and type
| Roisin
-class offshore patrol vessel
|
Displacement
| 1,500 tonnes Standard
|
Length
| 78.84 m (258 ft 8 in) overall
|
Beam
| 14.00 m (45 ft 11 in)
|
Draught
| 3.8 m (12 ft 6 in)
|
Installed power
| 10,000 kW (13,000 hp)
|
Propulsion
| Wartsila medium speed diesels
|
Speed
| 42.6 km/h (23.0 kn) maximum
|
Range
| 11,000 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
|
Complement
| 44 (6 officers and 38 ratings)
|
Sensors and
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 facilities
| None
|
LE
Roisin
(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
. Roisin or Roisin Dubh, is often used as an allegory for Ireland. However, the original Roisin Dubh was a daughter of Red Hugh O’Neill, Earl of Tyrone in the late 16th century.
[2]
Design
[
edit
]
The ship was designed by STX Canada Marine (now Vard Marine) and has an all-steel hull based on the
Mauritian
Vigilant
patrol vessel launched in 1995, but without the helicopter deck and hangar facilities. The level of automation incorporated into the ship's systems allows the ship to be operated with just 47 crew including eight officers. The vessel is designed for winter
North Atlantic
operations.
Weapon systems
[
edit
]
The ship is armed with an
OTO Melara 76 mm gun
dual-purpose gun installed on the bow gun deck. The gun fires 6 kg (13 lb) shells and is capable of firing up to 85 rounds per minute to a range of over 15 km (8 nmi). There are also two 12.7 mm machine guns and two 20 mm
Rheinmetall
Rh202
cannon for anti-aircraft defence.
The main gun is controlled by an Ultra Electronics Command and Control Systems, Radamec 1500 optronic director with a daylight TV camera, thermal imaging camera and eyesafe laser rangefinder. System 1500 functions in automatic or manual mode. The system provides fire control for surface engagement with spotting corrections in both line and range and has an effective secondary self-defence anti-air capability. System 1500 can detect a small patrol boat at ranges in excess of
12 km (
6
+
1
⁄
2
nmi), night or day. The ship's Kelvin Hughes surface search
radar
, operating at E, F and I bands, is installed high on the main mast over the bridge. The Kelvin Hughes navigation radar operates at I-band.
Command and control
[
edit
]
The communications package includes
VHF
, HF,
Inmarsat
Global Maritime Distress Safety System
(GMDSS) and
Differential Global Positioning System
(DFPS) and secure communications. Three inflatable boats are deployed from each ship; two 6.5-metre (21 ft 4 in) Delta
rigid inflatable boats
(RIB) launched with Caley davits, and a single Avon 5.4-metre (17 ft 9 in) RIB.
Propulsion
[
edit
]
The ship is powered by two
Wartsila
16V26 diesel engines each developing 5,000 kW (6,700 hp) continuous power. The engines drive two shafts with Lips inboard turning controllable pitch propellers via single reduction gearboxes. Each propeller is 2,500 mm in diameter and functions at 300 rpm.
The engines provide a maximum speed of 22 knots (41 km/h) with a range of 6,000 nautical miles (11,000 km) at a cruising speed of 15 knots (28 km/h).
A Brunvoll FU45 CPP bow thrusters, rated at 340 kW with 55 kilonewtons (12,000 lbf) of thrust, is fitted for precision manoeuvring and station keeping. A pair of non-retractable anti-roll fin stabilisers is also fitted.
Three Caterpillar 3412D1-T generators each deliver 405 kW of electric power at 1,500 rpm. One Caterpillar 3406D1-T emergency generator delivers 205 kW at 1,500 rpm.
Construction and career
[
edit
]
Roisin
was built by
Appledore Shipbuilders
in
Devon
,
[3]
entered service with the Irish Naval Service in September 1999 and is based at the
Haulbowline
Island,
Cork Harbour
Headquarters and Dockyard.
On 5 October 2004,
Roisin
was the first vessel on scene after the fire on board the
Canadian Forces
submarine
Chicoutimi
off the northwestern coast of
Ireland
. As
Roisin
attempted to assist the submarine, she suffered serious damage from the rough seas and was forced to return to harbour.
[4]
Roisin
enforced a 200 m (220 yd) exclusion zone around the vessel
Astrid
which ran aground on 24 July 2013 near Quay Rock at Ballymacus Point, near the
Sovereign Islands
in southern Ireland, while attempting to enter the harbour near
Kinsale
,
County Cork
.
[5]
[6]
Roisin
stood by the merchant vessel
Abuk Lion
in the
Irish Sea
30 nmi (56 km) off
Kinsale
,
County Cork
on 30 December 2013 when that vessel was in difficulties.
Abuk Lion
was later taken in tow by
Celtic Isle
.
[7]
Roisin
took part in a surveillance operation of the yacht
Makayabella
in September 2014 before it was boarded 200 nmi (370 km) off
Mizen Head
and subsequently had €80M worth of
cocaine
seized.
[8]
From May to July 2016
Roisin
was deployed to the
Mediterranean
as part of a humanitarian mission during the
European migrant crisis
,
[9]
and was involved in the rescue of several hundred people from unseaworthy vessels.
[10]
[11]
[12]
As of January 2023,
LE Roisin
and
LE Niamh
were reportedly tied-up at Haulbowline and would not be "[sent] on patrol due to the crippling staffing retention and recruitment crisis in the Defence Forces".
[13]
See also
[
edit
]
References
[
edit
]
External links
[
edit
]
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Active fleet
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Decommissioned
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Organisation
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Active fleet
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Shore establishments
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Related
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