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Type 45 destroyer
HMS Daring in 2010
HMS Daring departing Portsmouth Naval Base, 1 March 2010.
Class overview
Name: Type 45 destroyer
Builders: BAE Systems Surface Ships
Operators:  Royal Navy
Preceded by: Type 42
Cost: Over £1,050M per ship inc R&D
Planned: 6[N 1]
Completed: 6
Active: 6
General characteristics
Type: Guided missile destroyer
Displacement: 8,500 t (8,400 long tons; 9,400 short tons)[3][4]
Length: 152.4 m (500 ft 0 in)
Beam: 21.2 m (69 ft 7 in)
Draught: 7.4 m (24 ft 3 in)
Propulsion:

2 shafts integrated electric propulsion (IEP):

  • 2 × Rolls-Royce WR-21 gas turbines, 21.5 MW (28,800 shp) each
  • 2 × Wärtsilä 12V200 diesel generators, 2 MW (2,700 shp) each[5]
  • 2 × Converteam electric motors, 20 MW (27,000 shp) each
Speed: In excess of 30 kn (56 km/h; 35 mph)[6]
Range: In excess of 7,000 nautical miles (13,000 km) at 18 kn (33 km/h)[6]
Complement: 191[7] (accommodation for up to 235)
Sensors and
processing systems:
  • SAMPSON multi-function air tracking radar (Type 1045)
  • S1850M 3-D air surveillance radar (Type 1046)
  • 2 × Raytheon I-band Radar
    (Type 1047)
  • 1 × Raytheon E/F-band Radar
    (Type 1048)[8]
  • Ultra Electronics Series 2500 Electro-Optical Gun Control System (EOGCS)[9]
  • Ultra Electronics SML Technologies radar tracking system
  • Ultra Electronics/EDO MFS-7000 sonar
Electronic warfare
& decoys:
  • UAT Mod2.0 (2.1 planned)[10]
  • Surface ship torpedo defence (SSTD)
  • Armament:
  • Anti-air missiles:
  • Anti-ship missiles:
  • Guns:
  • Aircraft carried:

    1-2 × Lynx HMA8, armed with;

    • 4 × Sea Skua anti ship missiles, or
    • 2 × anti submarine torpedoes

    or
    1 × Westland Merlin HM1,[12] armed with;

    • 4 × anti-submarine torpedoes
    Aviation facilities:
  • Large flight deck
  • Enclosed hangar
  • The Type 45 destroyer, also known as the D or Daring class, is a class of six guided missile destroyers built for the United Kingdom's Royal Navy in the early 21st century. The class is primarily designed for anti-aircraft and anti-missile warfare and is built around the PAAMS (Sea Viper) air-defence system utilising the SAMPSON AESA and the S1850M long-range radars. The first three destroyers were assembled by BAE Systems Surface Fleet Solutions from partially prefabricated "blocks" built at different shipyards; the remaining three were built by BAE Systems Maritime – Naval Ships. The first ship in the Daring class, HMS Daring, was launched on 1 February 2006 and commissioned on 23 July 2009.[13]

    The Type 45 destroyers were built to replace the Type 42 (Sheffield-class) destroyers that had served during the Falklands War, with the last Type 42 being decommissioned in 2013. The National Audit Office reported that, during an "intensive attack", a single Type 45 could simultaneously track, engage and destroy more targets than five Type 42 destroyers operating together.[14] After the launch of Daring on 1 February 2006 Admiral Sir Alan West, a former First Sea Lord, stated that it would be the Royal Navy's most capable destroyer ever, as well as the world's best air-defence ship.[15] The reduction in the number to be procured from twelve, then to (up to) eight, finally with only six confirmed (in 2008) was controversial.[16][17]

    In 2016 it was revealed that due to a design flaw on the Northrop Grumman intercooler attached to the Rolls-Royce WR-21 gas turbines power availability was diminished considerably when functioning in the warm climate of the Persian Gulf;[18][19] and it quickly became apparent that the class was not operating as originally envisioned.[20] Therefore a planned refit was scheduled from 2019–21 to fully resolve the problems with the six ships in the class.[21]

    Under current plans, the Type 45 destroyer will be replaced by the Type 83 destroyer, the first of which is expected to enter service in the late 2030s.[22]

    Development

    The UK had sought to procure a new class of air-defence guided missile destroyers in collaboration with seven other NATO nations under the NFR-90 project; the project collapsed due to varying requirements of the different countries involved. The UK then joined France and Italy in the Horizon-class frigate programme; however, differing national requirements, workshare arguments and delays led to the UK withdrawing on 26 April 1999 and starting its own national project.[23] On 23 November 1999 Marconi Electronic Systems (MES) was confirmed as prime contractor for the Type 45 project.[24] Seven days later MES and British Aerospace merged to form BAE Systems (BAE), making the latter the prime contractor.

    The Type 45 project has been criticised for rising costs and delays, with the six ships costing £6.46 billion, an increase of £1.5 billion (29%) on the original budget.[25] The first ship entered service in 2010,[26] rather than 2007 as initially planned. In 2007, the Defence Select Committee expressed its disappointment that the Ministry of Defence (MOD) and BAE had failed to control rising costs.[27][28]

    Construction

    The Type 45 destroyers take advantage of some Horizon development work and use the Sea Viper air-defence system and the SAMPSON radar. The ships were built by BAE Systems Maritime – Naval Ships, which subsequently became BVT Surface Fleet with the merger of the surface shipbuilding arms of BAE Systems and VT Group. These two companies had previously built the ships in collaboration. BAE's two Glasgow shipyards and single Portsmouth shipyard were responsible for different "blocks". BAE's Govan yard built Block A (stern to the edge of helicopter hangar). The Scotstoun yard built Blocks B/C (a 2600 tonne section which contains the Rolls-Royce WR-21 gas turbines, starts with the helicopter hangar to the bridge section) and Block D (bridge section itself). BAE's Portsmouth shipyard was responsible for Blocks E/F (bridge to the bow) and the funnels and masts. For ships 2 to 6 blocks A-D were assembled in the Ships Block and Outfit Hall of the Govan shipyard, and taken fully outfitted to the Scotstoun berth. The masts and funnels were also fitted before launch.

    Construction of blocks of Dauntless at Portsmouth.

    For the first-of-class, Block A was assembled at Govan and moved to Scotstoun, where it was mated to Block B/C, which was already fitted with the WR-21 turbines and machinery. Block D, also assembled at Scotstoun, was fitted to these three blocks. The bow sections (E/F) were mated at Portsmouth and taken by barge to Scotstoun. These were the final blocks to be attached. At this point the hull was launched into the Clyde and towed to the Scotstoun Dry Dock where the masts and funnels were fitted (the masts were partially outfitted with equipment, for example, the mast for the S1850M radar is sent from Portsmouth to Thales Nederland to be fitted with radar equipment). Once this was complete, the remaining equipment was fitted: radar arrays, bow-mounted sonar, propellers, missile equipment and 4.5-inch gun.

    This modular construction arrangement was agreed in February 2002. However, when the original contract for three ships was signed in July 2000, BAE Systems Marine was to build the first and third ships, and VT Group was to build the second.

    By the end of 2010, all six Type 45 destroyers had been launched, with the first two in commission and the remainder fitting out. By 2012, all destroyers were structurally complete and the production lines had been closed. Duncan, the last of the Type 45 destroyers, was commissioned at Portsmouth Naval Base on 26 September 2013, and entered service in 2014 after trials and training.[29]

    The Daring class are the largest escorts ever built for the Royal Navy in terms of displacement.[N 3]

    In 2009 delivery of the ships' Aster missiles was delayed due to a manufacturing fault with a single batch of missiles identified during testing.[30][31]

    Characteristics

    General specifications

    The Type 45 destroyers are 152.4 m (500 ft 0 in) in length, with a beam of 21.2 m (69 ft 7 in), a draught of 7.4 m (24 ft 3 in) and a displacement of approximately 8,500 tonnes (8,400 long tons).[3][4] This makes them significantly larger than the Type 42 they replace (displacement 5,200 tonnes, 5,100 long tons, 5,700 short tons). The Type 45 destroyers are the first British warships built to meet the Lloyd's Register's Naval Ship Rules for hull structure requiring design approval by Lloyd's Register for the principal structural arrangements of the vessel.[32] BAE Systems is the Design Authority for the Type 45, a role traditionally held by the Ministry of Defence.[33] The design of the Type 45 brings new levels of radar signature reduction to the Royal Navy. Deck equipment and life rafts are concealed behind the ship's superstructure panels, producing a very "clean" superstructure, somewhat similar to that of the French La Fayette-class frigates. The mast is also sparingly equipped externally. Speculation by the press suggests that this design gives the ship the radar cross-section of a small fishing boat.[34]

    The Daring class is notable for being the first Royal Navy vessels to include gender-neutral living spaces to accommodate male and female crew members; communal shower and heads facilities have given way to individual cubicles, and six-person berths for junior ratings are far more flexible in accommodating a mixture of male and female sailors.[35] Men and women will continue to sleep in separate spaces, in common with most other navies.

    Propulsion

    The Type 45 is fitted with an advanced and innovative integrated electric propulsion system. Integrated electric propulsion seeks to supply all propulsion and ship's electrical load using alternating current at a high quality of voltage and frequency.[N 4] This is achieved by computerised control, high-quality transformation, and electrical filtering. Two Rolls-Royce WR-21 gas turbines drive GE alternators and along with two Wärtsilä 12V200 diesel generators provide electrical power at 4,160 volts to a GE high voltage system. The high voltage supply is then used to provide power to two GE Power Conversion advanced induction motors with outputs of 20 MW (27,000 hp) each. Ship's services, including hotel load and weapons system power supplies, are supplied via transformers from the high voltage supply at 440 V and 115 V.[36] The benefits of integrated electric propulsion are cited as:

    HMS Defender moored at Greenwich in London

    • Placing the electric motors closer to the propeller, shortening the shaft line and removing the need for a gearbox or controllable pitch propellers, and reducing exposure to action damage.[36]
    • Ability to arrange machinery in more convenient locations away from the shaftline, reducing space lost to funnels, and improving access for maintenance.[37]
    • Flexibility in running propulsion and ship services from any combination of prime movers reducing engine running hours and emissions.[36]
    • Ability to distribute prime mover power between services and propulsion can accommodate future increases in service and weapon loads with minimal impact on ship speed or prime movers.[citation needed]

    The key to the efficient use of a single prime mover is the choice of a gas turbine that provides efficiency over a large load range; the WR-21 gas turbine incorporates compressor intercooling and exhaust heat recovery, making it significantly more efficient than previous marine gas turbines, especially at low and medium load. The combination of greater efficiency and high fuel capacity gives an endurance of 7,000 nautical miles (13,000 km) at 18 knots (33 km/h).[36] High power density and the hydrodynamic efficiency of a longer hull form allow high speeds to be sustained. It has been reported that Daring reached her design speed of 29 knots (54 km/h) in 70 seconds and achieved a speed of 31.5 knots (58 km/h) in 120 seconds during sea trials in August 2007.[38]

    Faults

    In January 2016, the Ministry of Defence acknowledged that the propulsion system was unreliable, with the BBC reporting that "total electric failures are common".[39]

    The WR-21 gas turbine itself is of a sound design, however, the intercooler unit "has a major design flaw and causes the WR-21s to fail occasionally. When this happens, the electrical load on the diesel generators can become too great and they ‘trip out’, leaving the ship with no source of power or propulsion."[40] The First Sea Lord, Admiral Philip Jones, clarified that the "WR-21 gas turbines were designed in extreme hot weather conditions to what we call 'gracefully degrade' in their performance, until you get to the point where it goes beyond the temperature at which they would operate... we found that the resilience of the diesel generators and the WR-21 in the ship at the moment was not degrading gracefully; it was degrading catastrophically, so that is what we have had to address".[20]

    While the Ministry of Defence does not release detailed information related to the number of problems experienced by the class, including total engine failure, several such occasions have been reported in the media. Daring broke down in November 2010 and April 2012, Dauntless in February 2014 and Duncan in November 2016.[41][42][43][44][45] In November 2017, The Register reported that a Type 45 destroyer had been recalled to Britain with propeller problems, leaving the Royal Navy's traditional "east of Suez" deployment without proper warship cover. It was stated that "HMS Diamond is on her way back to the UK after a propeller problem proved too much for the ship's crew to repair on their own."[46]

    On 21 March 2018, the MOD announced the award of the £160 million "Power Improvement Project" (PIP) contract to BAE Systems, BMT Defence Services and Cammell Laird to remove the two current diesel generators and install three larger diesel generators at the latter's shipyard in Birkenhead.[47] Replacement or rectification of the WR-21s was not a practical option.[40] With the new diesel generators, the type need to rely on the WR-21s only for higher-speed running, and always with graceful degradation to cruising without catastrophic loss of power.[48] Dauntless arrived at Cammell Laird on 6 May 2020 to become the first ship to start the PIP upgrade.[49] Completion of the upgrade of all six ships is planned by the mid-2020s.[50]

    Advanced air-defence

    HMS Daring SAMPSON multi-function AESA radar

    The Type 45 destroyers are primarily designed for anti-air warfare with the capability to defend against targets such as fighter aircraft and drones as well as highly maneuverable sea skimming anti-ship missiles travelling at supersonic speeds.[51] The Royal Navy describes the destroyers' mission as being "to shield the Fleet from air attack".[3]

    The operations room aboard HMS Daring

    The Type 45 destroyer is equipped with the Sea Viper (PAAMS) air-defence system utilising the SAMPSON active electronically scanned array multi-function radar and the S1850M long-range radar. PAAMS is able to track over 2,000 targets and simultaneously control and coordinate multiple missiles in the air at once, allowing a large number of tracks to be intercepted and destroyed at any given time. This makes it particularly difficult to swamp PAAMS during a saturation attack, even if the attacking elements are supersonic.[52] The US Naval War College has suggested that the SAMPSON radar is capable of tracking 1,000 objects the size of a cricket ball travelling at three times the speed of sound (Mach 3), emphasising the system's capabilities against high performance stealth targets.[51]

    48-cell A50 Sylver Vertical Launching System on Daring

    A core component of PAAMS is the Aster missile, comprising Aster 15 and Aster 30. MBDA describes Aster as a "hit-to-kill" anti-missile missile capable of intercepting all types of high performance air threats at a maximum range of 120 km.[53] The Aster missile is autonomously guided and equipped with an active RF seeker enabling it to cope with "saturated attacks" thanks to a "multiple engagement capability" and a "high rate of fire".[53] Presently the Daring-class destroyers are equipped with a 48-cell A50 Sylver Vertical Launching System allowing for a mix of up to 48 Aster 15 and 30 missiles.

    In addition to its anti-air warfare role, PAAMS offers additional anti-ballistic missile capabilities. In March 2013 the United States Naval Institute reported that the Royal Navy along with the United States Missile Defense Agency would explore the potential of the Daring class to provide ballistic missile defence in Europe along with United States Navy Aegis Combat System-equipped destroyers.[54] In May 2014, it was reported by Jane's Information Group that the United Kingdom is committing more funds to explore the capabilities of the SAMPSON multi-function radar and the Type 45 destroyer in a ballistic missile defence role. This followed a successful live firing event at the Ronald Reagan Ballistic Missile Defense Test Site, Kwajalein Atoll in the Western Pacific Ocean, where Daring demonstrated the ability to "[detect] at the earliest opportunity, with tracks maintained through to intercept" two medium-range ballistic missile surrogate targets. BAE Systems reportedly told Jane's that the SAMPSON multi-function radar "exceeded expectations in all respects". An "Experiment Concurrency and Cueing (TECC)" event for the Type 45 was planned for late 2015.[55]

    Due to the greater capabilities of the Type 45 over predecessors, the high price per ship, and the public attention they have attracted, defence analysts and correspondents have referred to them as the "most advanced" or "most powerful" air-defence destroyers in the world.[56] BAE Systems claim that "the Type 45 Destroyer is recognised as the most advanced anti-air warfare vessel in the world."[57] Nick Brown, the editor-in-chief of Jane's International Defence Review, was quoted by The Huffington Post saying, "It's certainly one of the most advanced air defence ships in the world... The US Aegis system is similar, but Sea Viper is more advanced."[58]

    Weapons, countermeasures, capabilities and sensors

    The SAMPSON AESA multi-function air tracking radar makes a full 360° rotation every 2 seconds.

    The S1850M long-range air surveillance radar on HMS Daring.

    HMS Diamond firing her Aster missiles for the first time.

    Anti-air warfare

    The Sea Viper air-defence system:

    A 48-cell A50 Sylver Vertical Launching System for a mix of up-to 48:

    • Aster 15 missiles (range 1.7–30 km).
    • Aster 30 Block 0 missiles (range 3–120 km).

    The Type 45 initially does not have a formal theatre ballistic missile defence (TBMD) capability but its potential for such a role is being assessed.[59] Land-based Aster 30 Block 1 missiles have intercepted short-range ballistic missiles[60] and trials of a land-based SAMPSON modified for BMD were planned for early 2012.[61] The Ministry of Defence announced in 2013 that the first ship, Daring, would take part in ballistic defence trials with the US Missile Defence Agency (MDA) as part of a major research and development programme.[62] In March 2016 Britain and France announced a joint procurement programme with the intention of France acquiring Brimstone missiles to equip the Tiger Mk3 helicopter and Britain acquiring Aster Block 1NT missiles capable of intercepting medium range ballistic missiles of 1,000–1,500 km (620–930 mi) range. A block 2 version of the Aster 30 NT is under development by France and Italy capable of intercepting 3,000 km (1,900 mi) range missiles.[63]

    Planned upgrades

    From July 2021, there will be additional 24 Sea Ceptor missiles fitted to the Type 45, increasing the number of anti-air missiles onboard to 72. The ASTER 15 missiles will be removed and all Sylver cells will be fitted with ASTER 30.[64][65]It was also announced that Eurosam will provide a refresh of the Aster 30 missiles system that are currently in use. All six ships are likely to be upgraded in the 2026 to 2032 period.

    In May 2022, the Ministry of Defence announced that the Royal Navy's Type 45 destroyers would be upgraded with a ballistic missile defence capability. As part of this upgrade, which is named the Sea Viper Evolution programme, the six ships will be equipped with ASTER 30 Block 1 missiles and will receive upgrades to their SAMPSON radars and Sea Viper command and control systems.[66]

    Guns

    Aviation

    The flight deck of the Type 45 is large enough to accommodate aircraft up to the size of a Chinook helicopter.[71] It has hangar space for either one AgustaWestland Merlin HM1 or two Westland Lynx helicopters.[71] The Merlin HM2 has a dipping sonar, sonobuoys and radar; the Merlin carries four anti-submarine Sting Ray torpedoes whilst the smaller Lynx HMA8 carried either two Sting Ray or four Sea Skua anti-ship missiles. From 2015 the Lynx has been replaced in RN service by the AgustaWestland AW159 Wildcat whose weapons will include the Martlet missile from 2021 and the 'Future Air-to-Surface Guided Weapon (Heavy)' missile from 2022.[72] The Wildcat is reliant on ship's sensors to prosecute submarine targets, since in RN service it currently has no dipping sonar or sonobuoys of its own.[73]

    Anti-ship, submarine and land-attack

    • Four of the six Type 45 destroyers received Harpoon launchers recycled from the last four decommissioned Type 22 frigates.[74] Duncan, Diamond and Daring have all received this upgrade.[75][76][77] However, Harpoon SSMs are to be withdrawn from the Type 45s by 2023.[78]As of 2022, it was reported that the Harpoon SSM was no longer deployed on the destroyer.[79]
    • The Type 45 has a bow-mounted medium-frequency Ultra/EDO MFS-7000 sonar but its main anti-submarine weapon is its helicopter(s). As of August 2013 there were no plans to fit anti-submarine torpedo tubes.[74]
    • The 4.5-inch Mark 8 Mod 1 naval gun can be used against ships and for naval gunfire support (NGS) against land targets

    Countermeasures

    Communications and other systems

    • Fully Integrated Communications System (FICS45): a combined external and internal communications system supplied by Thales and Selex ES Ltd.[82]
    • In 2012, the UAT Mod2.0 digital Radar Electronic Surveillance system was fitted to Daring and Diamond as part of a £40m contract with Thales UK that will see UAT Mod2.1 fitted to the other Type 45's.[10]
    • METOC Meteorology and Oceanography: The Metoc system by BAE Systems comprises the Upper Air Sounding System using launchable radiosondes by Eurodefence Systems Ltd and Graw Radiosondes (Germany) joint venture, as well as a comprehensive weather satellite receiving system and a bathymetric system. These sensors provide each vessel with full environmental awareness for tasks such as radar propagation, ballistics and general self-supporting meteorological and oceanographic data production.

    Additional capabilities

    • Type 45 has sufficient space to embark 60 Royal Marines and their equipment.[3]
    • The Type 45 destroyers are designed with the ability to operate as flagships.[83]

    Ships in the class

    HMS Duncan the last ship of the class departing for sea trials in 2012.

    Six ships were ordered, and transfer of custody of the first happened on 10 December 2008.[84] The MoD's initial planning assumption was to procure twelve ships on a like-for-like replacement of a similar number of Type 42s, with the size of the second batch to be determined between 2005 and 2010.[1] However this was reduced to eight ships in the 2003 defence white paper entitled Delivering Security in a Changing World: Future Capabilities, following a strategic refocusing on "small to medium-scale operations" and expeditionary land operations.[51] It was reported in December 2006 that the last two could be cut.[85] In July 2007, Ministry of Defence officials stated that they "still planned to build eight Type 45 destroyers" and that "the extra two ships were still included in planning assumptions".[86] This plan was officially abandoned on 19 June 2008 when the Minister for the Armed Forces, Bob Ainsworth, announced in Parliament that options for the seventh and eighth destroyers would not be taken up.[2][87] The continual scaling back of the project, first from twelve to eight, and subsequently to six ships, has been criticised for leaving the Royal Navy with insufficient ships to meet its requirements.[16][17]

    On 9 March 2007, The Independent reported that Saudi Arabia was considering buying "two or three" Type 45s.[88] On 7 September 2007 it was reported that Saudi Arabian officials had been invited to observe Daring's sea trials.[89]

    In 2009 the House of Commons Public Accounts Committee conducted an enquiry into the procurement. Its main conclusions were that despite the destroyer being based on 80% new technology, there was a failure to take sufficient account of technical risk, over-optimism, and an inappropriate too-early fixed price project entered into before many elements had been specified. This resulted in a difficult commercial relationship until a contract renegotiation in 2007. It noted that the MoD believed six ships would still enable it to meet the operational requirement of having five ships at sea, with only a small risk of failing to meet that requirement.[25]

    In July 2016, it was reported that all six of the class were docked in Portsmouth. The Ministry of Defence said it was "unusual but not unprecedented" and that "All Type 45 destroyers are currently in port as they have either just returned from operations or are about to be deployed, are conducting training or carrying out maintenance or are home for crew to take summer leave."[90]

    In an interview with the Sunday Times, former Rear Admiral Chris Parry claimed that the Type 45 destroyers are noisy ships which can be heard 100 nautical miles (190 km; 120 mi) away by submarines.[91]

    In response to a written question in the House of Commons, 19 July 2021, Jeremy Quinn Minister of State, Ministry of Defence, detailed the status of the Type 45 destroyers as 4 undergoing refit in the UK, one being repaired abroad having been forced to detach from the CSG21 formation and one active with CSG21.[92]

    The entire class is based at HMNB Portsmouth.[93]

    Name Pennant number First steel cut[N 5] Launched Date of commission Homeport (as of March 2013)
    Daring D32 28 March 2003 1 February 2006 23 July 2009[94] Portsmouth[95]
    Dauntless D33 26 August 2004 23 January 2007 3 June 2010[96] Portsmouth[97]
    Diamond D34 25 February 2005 27 November 2007 6 May 2011[98] Portsmouth[99]
    Dragon D35 19 December 2005 17 November 2008 20 April 2012[100] Portsmouth
    Defender D36 31 July 2006 21 October 2009 21 March 2013[101] Portsmouth
    Duncan D37 26 January 2007 11 October 2010 26 September 2013[102] Portsmouth (Stage 2 Sea Trials)[103]

    Only three ships of the Type 45 Daring class carry the same names as members of the previous Daring-class destroyers of 1949; these are: Daring, Diamond and Defender. These names had been used for the D-class destroyers of the 1930s, with the addition of Duncan, which was also one of the Type 14 frigates in the 1950s. The remaining Type 45 names, Dauntless and Dragon, were previously carried by D-class cruisers of 1918, which served until 1945.

    In December 2020 the Minister for Defence Procurement, Jeremy Quin, indicated that under current plans the Type 45 destroyers would be decommissioned between 2035 and 2038.[104]

    See also

    Footnotes

    1. Six hulls were originally ordered, with a planning assumption that a further six would be ordered between 2005 and 2010.[1] This planning assumption was later reduced to a further two. In the 2008 defence budget, the Global Combat Ship programme (known then as the FSC) was brought forward at the expense of ships 7 and 8, resulting in the final order being left at six, with options for further ships not being taken up.[2]
    2. The Harpoon missile is to be fitted to four of the six ships. HMS Duncan is to be the first.[11]
    3. Largest in terms of displacement; however, the 6,200-ton County-class destroyers were some 6 metres (20 ft) longer, and the 6,300-ton Type 82 destroyer was 2 metres (6.6 ft) longer.
    4. High quality indicates that the frequency and voltage are stable, with an absence of spikes, even under changes in power demand.
    5. The Type 45 is constructed in modules, so the keel is not "laid down" as in the past. The ceremonial start of the ships' construction is "cutting the first sheet" of steel.

    References

    1. 1.0 1.1 "Appendix – Warship Building Strategies". Major Procurement Projects: Government Response. House of Commons Defence Committee. 24 October 2002. ISBN 978-0-21-500586-1. HC 1229. http://www.parliament.the-stationery-office.co.uk/pa/cm200102/cmselect/cmdfence/1229/122902.htm#a2. Retrieved 29 May 2010. "The MoD intends to make a decision on the size of the next batch of Type-45s in the second half of the decade. Until the main investment decision on the next batch is made, the size of that batch will remain a planning assumption." 
    2. 2.0 2.1 "Ministry of Defence Annual Report and Accounts Volume I including the Annual Performance Report and Consolidated Departmental Resource Accounts". Ministry of Defence (HM Government): 98. 21 July 2008. ISBN 978-0-10-295509-5. HC 850-I. http://www.mod.uk/NR/rdonlyres/31D096E9-3F41-4633-BEA2-AE62CF97C3AE/0/annrptvol1_200708.pdf. Retrieved 26 July 2011. "Six of these highly advanced and capable ships have been ordered, but following the 2008 planning round we no longer intend to place orders for any further Type 45 destroyers." 
    3. 3.0 3.1 3.2 3.3 "Type 45 Destroyer". Royal Navy. http://www.royalnavy.mod.uk/The-Fleet/Ships/Destroyers/Type-45-Destroyers. Retrieved 2011-11-06. 
    4. 4.0 4.1 "HMS Daring leaves Sydney after spectacular week of celebrations". 11 October 2013. http://www.royalnavy.mod.uk/News-and-Events/Latest-News/2013/October/11/131011-HMS-Daring-leaves-Sydney. 
    5. "HMS Daring". Wärtsilä. http://www.wartsila.com/fi/references/HMS-Daring. Retrieved 2011-08-01. 
    6. 6.0 6.1 Type 45 Facts by Royal Navy
    7. Royal Navy (11 July 2013). "A Global Force 2012/13" (pdf). Newsdesk Media. ISBN 978-1-906940-75-1. http://www.newsdeskmedia.com/files/Global-Force-2013.pdf.  Complement as of 24 April 2013
    8. "Raytheon Press Release" (PDF). 2006-03-08. http://www.raytheon.co.uk/news_room/news/press_release_08032006.pdf. Retrieved 2008-01-31. 
    9. "Jane's Electro-Optic Systems". 2010-10-28. http://articles.janes.com/articles/Janes-Electro-Optic-Systems/Ultra-Electronics-Series-2500-electro-optic-tracking-and-fire-control-system-United-Kingdom.html. Retrieved 2011-08-21. 
    10. 10.0 10.1 "Fleet to get the latest in electronic surveillance". Ministry of Defence. September 2012. p. 18. http://www.mod.uk/NR/rdonlyres/3624A3FC-1A13-42AE-B5C6-CF8F730807C3/0/desider_52_Sept2012InternetU.pdf. 
    11. Royal Navy - HMS Duncan, royalnavy.mod.uk
    12. "Air Defence Destroyer (T45)". Royal Navy. http://www.royalnavy.mod.uk/server/show/nav.2227. Retrieved 2007-11-20. [dead link]
    13. "UK Royal Navy Commissions Type 45 Destroyer HMS Daring". 24 July 2009. http://www.defpro.com/news/details/8784/. 
    14. "Providing Anti Air Warfare Capability: the Type 45 destroyer". 13 March 2009. p. 12. http://www.nao.org.uk/wp-content/uploads/2009/03/0809295.pdf. "In an intensive attack, a Type 45 destroyer would be able to simultaneously track, engage and destroy more targets than the remaining Type 42 destroyers operating together." 
    15. Nicoll, Alexander (1 February 2006). "Countess of Wessex Launches Royal Navy's New Warship". http://www.gnn.gov.uk/content/detail.asp?NewsAreaID=2&ReleaseID=186251. 
    16. 16.0 16.1 "Six of the best but scrap the rest". 20 June 2008. http://www.shippingtimes.co.uk/item_10092.html. 
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