Powering the world's navies - Wärtsilä

SHIP POWERWärtsilä is the leading provider of ship powersolutions including engines, generatingsets, reduction gears, propulsion equipment(propellers, shafts, waterjets), automation andpower distribution systems as well as sealingsolutions for the marine industry.POWERING THE WORLD’SNAVIES AND COAST GUARDSOur experience in providing propulsion andpowering solutions for Navy and Coast Guardvessels is a long standing one: more than 90countries entrust Wärtsilä with the supply ofequipment for their naval fleet.Through innovative solutions and services,Wärtsilä sets out to be the most valuedbusiness partner with products that arecapable of meeting the most stringent specialnaval requirements such as noise reductionand shock resistance.SERVICES WORLDWIDEWärtsilä provides maintenance and through-lifesupport services using the 160 offices of theWärtsilä group based in 70 countries all overthe world.THE BENEFIT OF EXPERIENCEIn addition to providing integrated propulsionsystems, dedicated specialised support isavailable:••System integration capability••Close cooperation with the major marineinstitutes to provide hydrodynamic studies••Technical abilities to meet specific navalrequirements••Through-life cost studies••Integrated Logistic support (ILS)••Preventive and corrective maintenanceCOMPLETE PROPULSION SOLUTIONSTaking in account the vessel mission profileand its operational conditions, we propose acustomised solution for each application. Ourpackage approach offers real benefits in termsof manufacturer’s support through the life of avessel.WÄRTSILÄ ONAUSTAL Australia 2009 ©Photo courtesy Courtesy of Chilean BVT NavyTHE SEVEN SEASUS NAVY, JOINT HIGH SPEED VESSEL (JHSV), JHSV-1• 4 x WLD1400SR waterjetsROYAL NAVY,ASTUTE CLASS SSN• AD sealsTKMS Blohm + Voss GmbH ©Photo in public domain.Photo courtesy of Chilean Navy and Skipteknisk A.S. of NorwaySOUTH AFRICAN NAVY, VALOUR CLASS,MEKO A-200 CORVETTES,SAS AMATOLA• hybrid propulsion solution• 2 x 5C09N controllable pitch propellers• 1 x LJ210E waterjetUS NAVY, LEWIS AND CLARK T-AKE CLASS, USNS LEWISAND CLARK, T-AKE1• fixed pitch propeller• shaftline• thrust bearing• set of seals & bearings• turning gearCHILEAN NAVY,MEDUSA PROJECT RESEARCH VESSEL• 3 x Wärtsilä 8L20 generating sets• main switchboard 690 V• IAS (Integrated Automation System)• fixed pitch propeller• 2 x electric motors transformersBVT Surface Fleet Ltd ©NAVANTIA ©BVT Courtesy Surface of Chilean Fleet Ltd Navy. ©ROYAL NAVY, DARING CLASS,T45 DESTROYERS,HMS DARING• 2 x Wärtsilä 12V200 generating sets• MD seals2SPANISH NAVY, ALVARO DE BAZAN CLASS, FRIGATESF-100, ALVARO DE BAZAN• 2 x 5C14N controllable pitch propellers• MX9 & ND sealsCHILEAN NAVY, PILOTO PARDO CLASSPZM POLICARPO TORO• 2 x Wärtsilä 12V26 A2 main engines• 2 x SCV62 gearboxes• 2 x Lipstronic 7000 advanced controls• 2 x 4D775 controllable pitch propellers• EL, SLB & NB seals & bearings

Royal Navy, RFA Wave Class, BVT Surface Fleet Ltd3

ENGINESWärtsilä engine designs are based on yearsof know-how and in life service which arecombined with innovations in response to thecustomer needs.••Reliability and low maintenance costs••High thermal efficiency and low emissions••Modular construction and reduced parts count••Ergonomic interfaces••Minimised consumables••Cylinder liner with Anti-Polishing Ring••Extended time between overhauls (up to24,000 hours between top overhauls)••Common Rail Technology••Emission compliant with IMO Tier IIrequirementsFRENCH NAVY, MISTRAL CLASS,BPC TONNERRE• 3 x Wärtsilä 16V32 generating sets• 1 x Wärtsilä 18V200 generating set• AC & MK2 seals• navigation system• interior communications © Dominique PipetWÄRTSILÄ 20The Wärtsilä 20 medium-speed engine offersa combination of advanced technologies andhigh performance in a compact, space-savingpackage. With its virtually pipeless, operatorfriendlydesign, the engine has started a newera in the development of medium-speedengines.Where power-to-weight and power-tospaceratios are concerned, for its givenspeed range, the engine is unmatched in itspower range. Operating reliably whilst burningthe poorest quality heavy fuel, the Wärtsilä 20also offers ultimate performance using lightdiesel oils.Overhaul intervals up to 24,000 hours andmaintenance-friendly design are some of themain valuable features that have earned theWärtsilä 20 an installed base of more than2000 engines since the launch in 1992.WÄRTSILÄ 26The Wärtsilä 26 represents the latest technicaladvances, combining fuel economy and lowemission rates with high fuel versatility.The Wärtsilä 26 (W26) family of mediumspeed engines is of modern concept anddesign and fully meets stringent Navalrequirements. It has been developed to meettoday’s and future requirements in respectof overall cost of ownership, emissions,shock and noise. Important features of theW26 engine are not only the high reliabilitybased on the low number of components,low through-life costs and compactness withhardly any pipes and all the pipe connections4Wärtsilä 26 enginebeing placed on one end of the engine, but alsoa high operational availability with MTBO of12,000 Hrs.WÄRTSILÄ 32The Wärtsilä 32 was developed in response to aneed in the market for a new engine in the 320mm cylinder bore class and since 1998 morethan 1200 of these engines have been soldworldwide.Based on the latest achievements incombustion technology, it is designed forefficient and easy maintenance in combinationwith long maintenance-free operating periods.The engine is fully equipped with allessential ancillaries and a thoroughly plannedinterface to external systems.WÄRTSILÄ 38The Wärtsilä 38 is a technologically advancedengine – a product that sets standards.The intelligent design makes the Wärtsilä38 the lightest and most compact heavy dutyengine on the market.The high level of technology incorporated inthis engine, its design, and the power plant thatis built around it, are all focused on achievingthe lowest possible kWh production cost.Generating set with low noise acoustic enclosureWÄRTSILÄ 46The Wärtsilä 46 is a medium-speed engine forwhich reliability and total economy have beenthe guiding principles.Extensive testing in our modern diesellaboratory backed up by several thousandrunning hours has made the Wärtsilä 46 areliable diesel engine.The extensive program reconfirmed thepredicted calculations and simulations aswell as performance mapping of factorssuch as heat balance, fuel and lube oilconsumption, exhaust emission, noise andvibration level.GENERATING SETSWärtsilä provides generating sets completewith alternators mounted on a commonbed-frame which meet our customersrequirements for shock, noise and vibrationlevels. By utilising double mountingarrangements and acoustic enclosures, navalstandards can be met and exceeded.Wärtsilä generating sets are in operationwith many of the world navies providingelectric power for diesel-electric propulsionand onboard ship services.

THE LEADING SYSTEMINTEGRATORWärtsilä has set forward a new approachto the lifecycle of the vessel by gettinginvolved at all stages, from ship designto new buildings or repowering of thecomplete propulsion system and finally forthe services of the ship.The global question behind the design ofa vessel is the efficiency of the propulsionsystem.According to Wärtsilä, everything startsfrom the interaction between the hull andthe propulsors.Then significant total savings can befound by optimizing the propeller designand matching it with the prime movers.Engine selection is another key elementto improve the overall efficiency. Wärtsiläoffers the configuration which provides theability to match and run the engines closeto optimum efficiency.The propulsion packages are developedaccording to the mission profile of thevessel as defined by the end-user.8ONE SUPPLIER: WÄRTSILÄThe benefits of having a single supplierthroughout the entire life cycle of the vessel,from conceptual design to construction andoperation provide value:••Opportunity for shipyards to focus on theircore competence (e.g. project management,hull production)••One supplier – One responsibility – Onesingle point of contact = Wärtsilä••Reduced risk from unforeseenincompatibilities••Less co-ordination work between parties,one interface••Classification for complete systems••Time-savings in design and engineering••Time-savings in purchasing process••Integrated system documentation••Production schedule discipline••Improved environment and work safety••Outfitting work from ship to shops••Warranty handlingWärtsilä aims to deliver the optimum totalsolution and performance tailored to thespecific operating profile of the vessel.From conceptual ship design to operating equipmentand control technology for the entire ship, from thebridge to the engine room to the propulsors.GEARBOXESWärtsilä gearbox design and productionfacility is based upon proven technology andexperience.Our gears covers a power range of 1 to25 MW for single input gearboxes with verticalor horizontal offset (with more than 350 gearconfigurations available), and 2 to 35 MW fortwin input-single output type of gearboxes (withmore than 100 gear configurations available).MAIN CHARACTERISTICS AND FEATURES••Modular and flexible design••Compact and reliable••Plain bearings••Rigid housing structure:Small deformationLow stress levelsCast iron or weldedLow noise and vibrating levels••Precision ground gearwheels with profilecorrection:Good load distribution over the gear toothLow noise

• Optional PTO/PTI solutions• Optional built-in multiple plate type ofclutch• Combined oil system for gear andpropeller (for sizes 50 to 95)NAVY APPLICATIONSWärtsilä offers custom designs developedfrom previously tested modules. We canmeet specifi c requirements including shockresistance, low noise and vibration levels, andsurvivability in a fl ooded compartment.We use 3D CAD with integratedFEM design to study and develop thehousings (cast or welded, according to theconfi guration and level of specifi cation)to achieve the necessary enhancedcharacteristics. The gearbox range isdesigned and developed with packagesolutions in mind and optimized forinstallation with Wärtsilä engines andpropulsion equipment.PROPULSION CONTROLSYSTEMSWhichever Wärtsilä power and propulsionsystems you choose, we provide a singlecontrol system.The new generation of Lipstronic 7000provides more effective load control andsecures optimal performance of the engineand propulsor.It is a unique combination of knowhowand experience from a supplier of propulsionsystems, engines and control systems.With its fully adjustable and easy-to-useset of parameters, Lipstronic 7000 is a singlesolution for all propulsion systems:• Controllable pitch propellers• Waterjets• Steerable thrusters• Transverse thrusters• Engine safety system• Rudder control system• Joystick systemSTEERABLE THRUSTERSWärtsilä steerable thrusters are delivered inmodular, retractable, underwater mountableand containerized designs in fi xed pitch andcontrollable pitch executions.They are designed, manufactured anddelivered in close cooperation with thecustomer.Wärtsilä steerable thrusters generateconsiderable savings in cost due to theirreliable and durable components, effi cientpropeller and maintenance-friendly design.TRANSVERSETHRUSTERSWärtsilä transverse thrusters can be equippedwith fi xed pitch or controllable pitch propellers.Their design and layout have been directedtowards easy inspection and maintenance,which in turn leads to minimum maintenancecosts.9

Photo in public domainFIXED PITCH PROPELLERSWärtsilä produces high quality Fixed PitchPropellers (FPP) and Built-Up Propellers (BUP)for a wide range of naval applications.These propellers are manufactured,controlled and tested in Wärtsilä factories inThe Netherlands, in Norway or in Spain, whereskilled and trained grinders can achieve thehighest manufacturing and fi nishing tolerancesnecessary for such high effi ciency propellers.SILENT PROPELLERSUntil now, the radiated noise of a propellercannot be predicted with suffi cient accuracyin order to directly select the geometricalcharacteristics which will control and reducethis radiated noise. As the cavitation is animportant source of noise, the wet parts of theship, especially the propeller, should be freeof any type of cavitation at the sailing speedof 11 knots, which means that the CavitationInception Speed (CIS) should be higher than11 knots to ensure radiated noise levels aslow as possible. An indirect strategy for noisereduction has been developed to delay theinception of cavitation.Wärtsilä has developed its expertise forFPP and BUP designs with the cooperationof the major institutions and model basinsin this fi eld of research. Some of the mostwell-known research vessels are equippedwith Wärtsilä propellers including CEFASEndeavour, IFREMER Pourquoi Pas, IMR G.O.SARS., MARINE INSTITUTE Celtic Explorer,NERC James Cook or SKIPSTEPNISK Cabo deHornos.These vessels have reached silent operationlevels never achieved before, signifi cantlybelow the ICES 209 curve, by avoidingthe noise normally created by cavitationor pressure pulses. These operationalachievements offer huge benefi ts to ourcustomers in trying to achieve the even moreaccurate measurements demanded by thescientifi c community.This expertise is also applicable to navalapplications. Navies have an increasing need fordiscrete vessels radiating as little underwaternoise as possible. Our experience ensures thestealth capability of strategic vessels.MARINE SEALSWärtsilä is the world’s leading supplier ofmarine engineering sealing systems.Moreover, we are the only supplier in the worldto offer a full range of both radial and axial sealtypes for any naval vessel type or size.KEY POINTS• Since 1971 we have specialized in supplyingnaval sealing solutions and to date havesupplied to more than 75 of the world’s navies.• Extensive shock qualifi cation throughout therange• Widest range of seal sizes and applications• Patented technologies and design philosophiesfor superior naval sealing solutions.The main propulsion sealing system is ManeSeal,an innovative concept with wrapped bellows anda split design.10

US NAVY, LEWIS AND CLARK T-AKE CLASS,USNS LEWIS AND CLARK, T-AKE1• fixed pitch propeller• shaftline• thrust bearing• set of seals & bearings• turning gearINTERNATIONAL COUNCILFOR THE EXPLORATIONOF THE SEA (ICES)For research ships, the Cooperative ResearchProject n°209 from the International Councilfor the Exploration of the Sea (ICES) [RBMitson, “Underwater Noise of ResearchVessels, Review and Recommendations”,1995] gives recommendations on theunderwater radiated noise.The main objective of theserecommendations is to defi ne a spectrum ofacceptable underwater radiated noise levelsto avoid “any disturbance of the naturaldistribution of the fi sh” but also to “ensurethat the fi sh target distributions and echointegratorresults are free of bias due to highfrequencynoise”.The noise levels should be measured for aship sailing at 11 knots.PROPELLERSFOR RESEARCHSHIPSAll the parts of a vessel contribute to theunderwater radiated noise, the activeinner parts (such as machinery) as wellas the passive outer parts (the hull and itsappendages) due to turbulence in the fl ow onthese surfaces.The propellers become one of theessential sources of noise with the increasingvessel speed because of the occurrence andthe extension of the cavitation phenomenonwhich increases dramatically the noise levelsat all frequencies.The graphic shows the underwaterradiated noise curves of different vesselsequipped with Wärtsilä propellers, versus theICES 209 curve, at 11 knots.150140dB re 1mPa at 1m (1Hz band)1301201101009080ICES 209Wärtsiläequippedresearchvessels7010 100 1000 10 000 100 000Frequency (Hz)Tried and tested throughout the world’s navies,ManeSeal can be changed without having toremove the propeller and tail shaft. The rangealso includes an infl atable maintenance sealand an optional auxiliary packing.OTHER PRODUCTS AVAILABLE• Rudder stock seals• Stabilizer seals• Waterjet seals• Pump seals for all on-board applications• ManeSafe ND shaft bulkhead seal• ManeBar water or oil lubricated• sterntube seals• ManeDive, a high-pressure water lubricatedsterntube seal.Underwater radiated noise curves of different vessels equippedwith a Wärtsilä propeller, versus the ICES 209 curve, at 11 knots.CHILEAN NAVY,MEDUSA PROJECT RESEARCH VESSEL• 3 x 8L20 generating sets• main switchboard 690 V• IAS (Integrated Automation System)• fixed pitch propeller• 2 x electric motors transformersPhoto courtesy of Chilean Navy and Skipsteknisk A.S. of Norway11

WATERJETSWärtsilä is the leading supplier of AXIALfl ow stainless steel waterjets for highendapplications: design and engineeringof these waterjets combine advancedtechnology, reliability and ease ofmaintenance. Wärtsilä proposes alsonon-axial waterjets, successfully deliveredworldwide since the 1970s.WÄRTSILÄ AXIAL WATERJETSWärtsilä axial fl ow waterjets are a line ofsingle stage compact high performancewaterjets combining mixed fl ow propertieswith an axial build. The result is reducedtransom occupation with highly increasedcavitation margins.AVERAGE 25% REDUCED TRANSOMOCCUPATION Jet sizes are indicated bythe front side diameter of the impellerseat ring. Non-axial designs expand in aradial direction downstream directing thefl ow through the jet over an less effi cientpath. This results in a large transom fl angediameter and often diffi culties with fi ttingthe jet in the available space either in widthor height. The Wärtsilä axial waterjet seriestakes away all disadvantages by minimizingtransom occupation and by offering anaverage 25% smaller diameter of thetransom mounting fl ange.UP TO 10% LOWER WEIGHT The reducedtransom size not only results in reduceddimensions, but also gives a substantiallower weight of the installation. If this iscombined with our welded jet constructionallowing further weight optimizations,savings can be as high as 15% comparedto non-axial build jet designs.AVERAGE 10% HIGHER ROTATIONALSPEED = 10% LESS TORQUE Comparedwith non-axial design the rotational speedof the impeller is on average 10% higherwhile the impeller tip speed is still lower.The lower torque can give both weightand cost savings for couplings, shafts andgearboxes.LARGER MARGINS FOR OPERATINGFLEXIBILITY AND MANOEUVRING Thecavitation margins of the pump are shiftedbackwards with at least 35%. Due to thisincrease in cavitation margin and the lowerimpeller tip speed, more power can be12SOUTH AFRICAN NAVY, VALOUR CLASS,MEKO A-200 CORVETTES, SAS AMATOLAHybrid propulsion solution• 2 x 5C09N controllable pitch propellers• 1 x LJ210E waterjetallowed during manoeuvring resulting in a 15%higher manoeuvring thrust. Furthermore withthe additional cavitation margin, operation witha reduced number of shaft lines is possibleat a higher load of the remaining enginesresulting in better operating fl exibility.INCREASE IN POWER ABSORPTION ATMANOEUVRING During manoeuvring enginesoperate in a critical zone and waterjets tend toabsorb increased power at a lower rotationalspeed of the impeller. The result is a highload for the engine resulting in smoke and anincreased thermal load. The increase in powerabsorption of the Wärtsilä axial jet series is upto 70% lower than of competing designs.TKMS, Blohm + Voss GmbH ©Wärtsilä waterjet LJ210E, reverse bucketDESIGN LAYOUTS All jet designs are availablein a steering/reversing (SR), reversing only (R)and booster execution (B). On request, Wärtsiläcan supply designs for special applicationsfor instance giving thrust in all directions360 degree or offering shock compliantinstallations. The key benefi ts of the axialtechnology are valid for all executions.WÄRTSILÄ NON-AXIAL WATERJETSThe non-axial E-type waterjet is still availablein the Wärtsilä product portfolio for thoseapplications requiring extreme speeds.Four large steering and reversing Wärtsilä2 X LJ160E and 2 X LJ150E waterjets are

used in the propulsion system of the USSIndependence (LCS-2). The ship, withan overall length of 127 m and full loaddisplacement of 2,637 tons, is an innovativecombatant designed to operate in shallowwater environments to counter challengingthreats in coastal regions, specifi cally mines,submarines and fast surface craft. LCS-2 iscapable of speeds in excess of 40 knots andcan operate in water less than 20 feet deep.US NAVY, LITTORAL COMBAT SHIPLCS-2 USS INDEPENDENCE• 2 x LJ150E waterjets for the wing propulsion lines• 2 x LJ160E waterjets for the centre propulsion linesThrust reversing cylinderSteering cylindersSteering arc(60° lock to lock)ThrustShip transomAxial-flow impellerDrive shaftAustal Australia 2009 ©Thrust bearingDrive inputIntakeHYBRID OR WARP SYSTEMSUnique to Wärtsilä is the delivery of varioushybrid or Waterjet And Refi ned Propeller(WARP) systems. These systems combinecontrollable pitch propellers with a waterjet.The benefi t is that the largest parts of thetotal installed vessel power can be absorbedby the waterjet. Despite the high amountof power the dimensions of the jet remainrelatively small due to the high allowedpower density compared to a propeller. Withthe jet taking most of the total vessel power,the propellers can remain small in diameteras well limiting the draft of the vessel.The result is a very attractive operationalprofi le. The propellers are fully optimized forlower cruising speeds delivering optimumeffi ciency with low noise and vibrations.At the same time the combination of thewaterjet and the propellers still gives accessto higher speeds when required. Hybridsystems were delivered for various yachtswith total vessel power up to 32 MW and forNavy vessels up to 28 MW.Steering & reversing nozzleStator bladesINCREASED CAVITATION MARGIN AT LOW SPEEDWaterjet thrust and vessel resistance [relative, dimensionless]10090WLD - AXIAL FLOWCONTINUOUS CAVITATION LIMITFull throttle =100% MCR8095% MCR90% MCR85% MCR7080% MCRLJ - MIXED FLOW75% MCRCONTINUOUS CAVITATION LIMIT6070% MCRVESSEL RESISTANCE65% MCR60% MCR5055% MCR50% MCR4045% MCR40% MCR3035% MCR30% MCR2025% MCR20% MCR1010 15 20 25 30 35 40 45Speed [knots]“Increased cavitation margin at low speed” shows the cavitation limit line for the WLD axial flow design(orange) and the LJ mixed flow design (blue). The area in between the lines is thus the achieved gain incavitation margin for the new design.INCREASEDPERFORMANCEIn order to be able to respond to oncomingthreats, Navy and Coastguard operators alikeexpect greater fl exibility from their vessels.This being for fast acceleration where thewaterjet needs to rapidly convert the enginepower into thrust (particularly for planinghulls) as well as for low patrolling speedswhere the waterjet needs to be able tooperate for longer periods without restrictionfrom cavitation. The Wärtsilä WLD rangeof waterjets permits prolonged continuousoperation at low speeds without restriction.13

R&D, NEWTECHNOLOGIESConsiderable research and developmentinvestments have placed Wärtsilä as amarket leader capable of offering innovativetechnologies to boost energy efficiency andenvironmentally sound operation at sea.Even though these measures may make asignificant difference, now or sometime inthe future, they are just the beginning.In addition to engine tuning by usinga combination of superior propulsionsolutions along with first class products andinventions, Wärtsilä can offer more than 30different ways of making your vessel operatemore efficiently.14ENVIRONMENTAL PERFORMANCEMEDIUM-SPEED ENGINESWärtsilä’s medium-speed engines arealready emission compliant with IMO Tier IIrequirements. The Wärtsilä engines offer highefficiency, low exhaust gas emissions and safeoperation.SO X EMISSIONSSince 2005 Wärtsilä offers guidelines for lowsulphur fuel oil operation. The purpose of thisdocument is to provide advice for design,modification and operation of new buildingsand existing ships to comply with futurelegislation related to low sulphur content in thefuel.NO X EMISSIONSThe annex VI of the MARPOL 73/78 conventionentered into force on 19 May 2005, theexhaust emissions regulations are now referredto as IMO Tier I.In October 2008, the Marine EnvironmentProtection Committee (MEPC) of IMOadopted amendments to the MARPOL AnnexVI regulations. These specify further NO Xemission limits known as IMO Tier II and Tier III.Under IMO Tier II, the NO X emission limitsfor engines installed in ships constructedon or after 1 January 2011 will be reduced,according to a speed-dependent function,about 20% from the presently valid IMO Tier Ilevels.

SERVICESSeveral customers have recognized us astheir preferred service supplier to ensure theavailability and cost-efficient operation of theirinstallations. They benefit from having theirentire power system fully serviced by one globalsupplier. Wärtsilä Services provides full servicethroughout the product lifecycle for both marineand power plant customers, and is constantlydeveloping its worldwide network.Additionally we are continually broadeningour range of services by adding valuableproducts and specialist services to ourportfolio. In this way we also supportequipment onboard your vessel or at yourinstallation and in our numerous workshopsaround the globe and in key ports, regardlessof your equipment make.We offer lifecycle efficiency solutions in thefollowing services product lines:••Engine Services••Propulsion Services••Electrical & Automation Services••Boiler Services••Operations & Management Services••Training Services••Environmental ServicesThese services cover everything frombasic support with parts, field service andtechnical support to service agreementsand condition based maintenance; frominstallation and commissioning, performanceoptimization, including upgrades andconversions, to environmental solutions,technical information and online support.The choice available to you extends fromparts and maintenance services to a varietyof comprehensive, customized long-termservice agreements, including performanceand operations & management agreements.Our Services organization currently featuresmore than 11,000 dedicated professionalsin 70 countries.Wärtsilä adds value to your businessat every stage in the lifecycle of yourinstallations. With us as your service partner,you receive many measurable benefits suchas availability and performance, productivitygains and cost benefits. Above all, peace ofmind in the knowledge that your installationis being serviced by the most experiencedpartner you could have – Wärtsilä.Under IMO Tier III, the NO X emission limitfor engines installed in ships constructedon or after 1 January 2016 will be reduced,according to a speed-dependent function,about 80% from the presently valid IMOTier I levels when the ship is operating in adesignated Emission Control Area. Outsidethe designated Emission Control Areas, Tier IIlimits will apply.© THALES15

Wärtsilä Ship Power, Navy3 bd de la Loire – BP 97511 4275 Nantes Cedex 2, FranceTel: +33 2 40 41 16 02, Fax: +33 2 40 41 16 00Email: wld@wartsila.comwww.wartsila.com/navyWärtsilä is a global leader in complete lifecycle power solutions for themarine and energy markets. By emphasising technological innovationand total efficiency, Wärtsilä maximises the environmental and economicperformance of the vessels and power plants of its customers. Wärtsiläis listed on the NASDAQ OMX Helsinki, Finland.01.2011 / Bocks OfficeWÄRTSILÄ ® is a registered trademark. Copyright © 2011 Wärtsilä Corporation.Royal Navy, HMS Daring, BVT Surface Fleet Ltd