- LÉ Niamh (P52)
LÉ "Niamh" (P52) is a sclass|Róisín|offshore patrol vessel in the
Irish Naval Service . It is the youngest ship in service in the Irish fleet, and is named after Niamh, queen ofTír na nÓg , a character fromIrish mythology .History
The second of class "Róisín"-class offshore patrol vessel, "Niamh" was built by
Appledore Shipbuilders inDevon , entered service with the Irish Naval Service in July 2001, and is based at theHaulbowline Island,Cork Harbour Headquarters and Dockyard.Design
The ship has an all-steel hull based on the
Mauritian "Vigilant" patrol vessel launched in1995 , but without thehelicopter deck and hangar facilities. The high level of automation incorporated into the ship's systems allows the ship to be operated with just 44 crew including six officers. The crew is provided with comfortable accommodation. The vessel is designed forwinter North Atlantic operations.Weapons systems
The ship is armed with an OTO Melara 76 mm gun installed on the bow gun deck. The gun fires 6 kg shells and is capable of firing up to 85 rounds per minute to a range of over 15 km. There are also two 12.7 mm machine guns.
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, 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
The communications package includes
VHF , HF,Inmarsat Global Maritime Distress Safety System (GMDSS) andDifferential Global Positioning System (DFPS) and secure communications. Three inflatable boats are deployed from each ship; two 6.5 m Delta rigid inflatable boats (RIB) launched with Caley davits, and a single Avon 5.4 m RIB.Propulsion
The ship is powered by two
Wartsila 16V26 diesel engines each developing 5,000 kW 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 300rpm .The engines provide a maximum speed of 41 km/h (22 knots) with a range of 11,100 km (6,000 nautical miles) at a cruising speed of 28 km/h (15 knots).
A Brunvoll FU45 CPP bow thrusters, rated at 340 kW with 5.6 t (55 kN) 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 kWe at 1,500 rpm. One Caterpillar 3406D1-T emergency generator delivers 205 kWe at 1,500 rpm.
Other
"Niamh" was involved in the rescue of the Canadian Navy
submarine HMCS|Chicoutimi|SSK 879|2 off the northwestern coast ofIreland onOctober 5 ,2004 .ee Also
*
LÉ Róisín (P51)
*Protector class OPV RNZNExternal links
* [http://www.military.ie/naval/flotilla/p52/niamh.htm IDF LÉ "Niamh" webpage]
* [http://www.akeryardsmarine.com/ship_patrol.html Web page from the naval architecture firm that designed IDF LÉ "Niamh"] .
* [http://www.appledore-shipbuilders.co.uk/Niamh.htm Appledore's page on "Niamh"]
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