HMAS Hobart (DDGH 39)

For other ships of the same name, see HMAS Hobart.
Hobart under construction in April 2015
History
Australia
Namesake: City of Hobart, Tasmania
Ordered: 4 October 2007
Builder:
Laid down: 6 September 2012
Launched: 23 May 2015
Completed: June 2017 (planned)
Honours and
awards:		 Nine inherited battle honours
Status: Under construction
General characteristics (as designed)
Type: Air warfare destroyer
Displacement: 6,250 tonnes (6,150 long tons; 6,890 short tons) full load
Length: 147.2 metres (483 ft)
Beam: 18.6 metres (61 ft) maximum
Draught: 5.17 metres (17.0 ft)
Propulsion:
  • Combined diesel or gas (CODOG) arrangement
  • 2 × General Electric Marine model 7LM2500-SA-MLG38 gas turbines, 17,500 kilowatts (23,500 hp) each
  • 2 × Caterpillar Bravo 16 V Bravo diesel engines, 5,650 kilowatts (7,580 hp) each
  • 2 × controllable pitch propellers
Speed: Over 28 knots (52 km/h; 32 mph)
Range: Over 5,000 nautical miles (9,300 km; 5,800 mi) at 18 knots (33 km/h; 21 mph)
Complement:
  • 186 + 16 aircrew
  • Accommodation for 234
Sensors and
processing systems:
  • Aegis combat system
  • Lockheed Martin AN/SPY-1D(V) S-band radar
  • Northrop Grumman AN/SPQ-9B X-band pulse Doppler horizon search radar
  • Raytheon Mark 99 fire-control system with two continuous wave illuminating radars
  • 2 × L-3 Communications SAM Electronics X-band navigation radars
  • Ultra Electronics Sonar Systems' Integrated Sonar System
  • Ultra Electronics Series 2500 electro-optical director
  • Sagem VAMPIR IR search and track system
  • Rafael Toplite stabilised target acquisition sights
Electronic warfare
& decoys:
  • ITT EDO Reconnaissance and Surveillance Systems ES-3701 ESM radar
  • SwRI MBS-567A communications ESM system
  • Ultra Electronics Avalon Systems multi-purpose digital receiver
  • Jenkins Engineering Defence Systems low-band receiver
  • 4 × Nulka decoy launchers
  • 4 × 6-tube multi-purpose decoy launchers
Armament:
Aircraft carried: 1 x MH-60R Seahawk

HMAS Hobart (DDGH 39), named after the city of Hobart, Tasmania, is the lead ship of the Hobart-class air warfare destroyers under construction for the Royal Australian Navy (RAN). The ship, based on the Álvaro de Bazán-class frigate designed by Navantia, was built at ASC's shipyard in Osborne, South Australia from modules fabricated by ASC, BAE Systems Australia in Victoria, and Forgacs Group in New South Wales. Hobart was ordered in 2007, but errors and delays in construction have caused extensive schedule slippage. Despite commissioning initially planned for December 2014, the ship was not laid down until September 2012, and launched in May 2015, with completion now planned for June 2017.

Design

The Australian Air Warfare Destroyer (AWD) project commenced in 2000, to replace the Adelaide-class frigates and restore the capability last exhibited by the Perth-class destroyers.[1][2] The AWD Alliance (a consortium of the Defence Materiel Organisation (DMO), shipbuilder ASC, and combat system designer Raytheon) was created to oversee the acquisition project.[2] In August 2005, Gibbs & Cox's Evolved Flight II Arleigh Burke-class destroyer concept and the Navantia-designed Álvaro de Bazán-class frigate were selected from the initial round of tendering for further study.[3][4] Although the Arleigh Burke concept was larger, better-armed, and more capable on paper, the Álvaro de Bazán class was selected June 2007 as the basis of the AWD as they had seen active service, could be in Australian service earlier and were cheaper.[5][3] Three ships were ordered on 4 October 2007, with an unexercised option for a fourth.[2][6]

Hobart will have a full-load displacement at launch of 6,250 tonnes (6,150 long tons; 6,890 short tons), a length overall of 147.2 metres (483 ft), a maximum beam of 18.6 metres (61 ft), and a draught of 5.17 metres (17.0 ft).[2][7] The combined diesel or gas turbine (CODOG) propulsion arrangement consists of two General Electric Marine model 7LM2500-SA-MLG38 gas turbines, each generating 17,500 kilowatts (23,500 hp), and two Caterpillar Bravo 16 V Bravo diesel engines, each providing 5,650 kilowatts (7,580 hp).[2] These drive two propeller shafts, fitted with Wärtsilä controllable pitch propellers.[2] The ships' maximum speed is over 28 knots (52 km/h; 32 mph), with a range of over 5,000 nautical miles (9,300 km; 5,800 mi) at 18 knots (33 km/h; 21 mph); although slower than equivalent designs, the greater range and endurance is more important for Australian operating conditions.[2] She is also fitted with a bow thruster.[2] The standard ship's company is 186-strong, plus 16 additional personnel to operate and maintain the ship's helicopter, with maximum accommodation for 234.[2]

The destroyer's main weapon is a 48-cell Mark 41 Vertical Launch System, capable of firing RIM-66 Standard 2 anti-aircraft missile or quad-packed RIM-162 Evolved Sea Sparrow point-defence missiles, with likely upgrades to carry RIM-174 Standard 6 anti-aircraft missiles and Tomahawk cruise missiles.[2][8] This will be supplemented by two four-canister Harpoon anti-ship missile launchers, and a BAE Systems 5-inch/62 calibre Mark 45 gun.[2] Two Mark 32 Mod 9 two-tube launchers fitted with Eurotorp MU90 torpedoes will be carried for anti-submarine warfare .[2] For close-in defence, an aft-facing Phalanx CIWS system and two M242 Bushmaster autocannons in Typhoon mounts sited on the bridge wings are fitted.[9] A single MH-60 Romeo Seahawk will be embarked.[7]

The ship's sensors are built around the Aegis combat system, with a Lockheed Martin AN/SPY-1D(V) S-band main radar, a Northrop Grumman AN/SPQ-9B X-band search radar, a Raytheon Mark 99 fire-control system with two continuous wave illuminating radars for missile direction, and two L-3 Communications SAM Electronics X-band navigation radars.[2] An Ultra Electronics Sonar Systems' Integrated Sonar System is fitted, which includes a hull-mounted sonar and a towed variable depth sonar built up from a quad directional active-passive receive array, a passive torpedo detection array and a high-powered towed sonar source.[2] Other sensors include an Ultra Electronics Series 2500 electro-optical director, a Sagem VAMPIR IR search and track system, and Rafael Toplite stabilised target acquisition sights for each ship's Typhoons.[2] Electronic warfare sensors consist of the ITT EDO Reconnaissance and Surveillance Systems ES-3701 electronic support measures (ESM) radar, a SwRI MBS-567A communications ESM system, an Ultra Electronics Avalon Systems multi-purpose digital receiver, and a Jenkins Engineering Defence Systems low-band receiver.[2] Countermeasures include four launchers for Nulka decoy missiles, plus four six-tube launchers for radio frequency, infrared, and underwater acoustic decoys.[2]

Construction

The ship was assembled from 31 pre-fabricated modules ('blocks'): 12 for the hull, 9 for the forward superstructure, and 10 for the aft superstructure.[10][11] Modules were fabricated by ASC in South Australia, BAE Systems Australia in Victoria, and Forgacs Group in New South Wales, with final assembly of the ship at ASC's shipyard in Osborne, South Australia.[2][6][10][11] Delays and project slippage resulted in the redistribution of block construction across the three shipbuilders, and the bow hull block was constructed by Navantia.[12][13]

In October 2010, the 20-by-17-metre (66 by 56 ft) central keel block for Hobart was found to be distorted and incompatible with other hull sections.[14] Incorrect drawings from designer Navantia and first-of-kind manufacturing errors by manufacturer BAE were blamed, and the delay in reworking the block set construction back at least six months.[14][15] Other major issues during construction included the need to replace 25% of the destroyer's internal pipework due to faulty manufacture, and the initial rejection of the ship's mainmast block because of defects in the cabling and combat system equipment.[16][17]

Hobart's keel was laid down on 6 September 2012.[18] The ship was launched on 23 May 2015, with 76% of construction complete.[19][20] Construction of Hobart and her sister ships saw numerous delays: a planned December 2014 commissioning for Hobart was pushed back in September 2012 to March 2016, then again in May 2015 to delivery in June 2017.[2][18][21] As of October 2015, construction of Hobart was estimated to be 30 months behind schedule and $870 million over budget.[22] Sea trials are slated to begin in September 2016.[22] On commissioning, Hobart will be assigned the pennant number "DDGH 39".[23]

Citations

  1. ↑ Gulber, Growth in Strength, p. 5
  2. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Pengelley, Aussie rules
  3. 1 2 Brown, Spanish designs are Australia's choice for warship programmes
  4. ↑ Department of Defence, Preferred designer chosen for AWD contract
  5. ↑ Shackleton, Choices and consequences
  6. 1 2 Kerr, Australia seeks to extend AWD options
  7. 1 2 Gulber, Growth in Strength, p. 8
  8. ↑ Thornhill, Force 2030, pp. 9–10
  9. ↑ Gulber, Growth in Strength, p. 7
  10. 1 2 Grevatt, AWD Alliance admits destroyer contract hit by construction 'difficulties'
  11. 1 2 Grevatt, NQEA loses block-building deal for Australian destroyers
  12. ↑ Stewart, Overdue and over budget
  13. ↑ Royal Australian Navy, Changes to Air Warfare Destroyer Construction Program
  14. 1 2 Stewart, $8bn navy flagship founders after construction bungle
  15. ↑ Stewart, BAE shipyard to blame for destroyer delays: Defence
  16. ↑ McPhedran, Navy warships project heading for cost blowout
  17. ↑ Greene, Companies building multi-billion-dollar warships feared defects would damage their reputations, leaked documents show
  18. 1 2 Cullen, Work on $8bn destroyer fleet delayed
  19. ↑ Starick, First look aboard Adelaide-built air warfare destroyer, the Hobart
  20. ↑ Radio Australia, Air Warfare Destroyer project: HMAS Hobart launched, SA Premier calls on Government to trust workers with next generation submarines
  21. ↑ Sheridan, Warships cost blows out to $9bn
  22. 1 2 Naval-technology.com, HMAS Hobart construction costs overrun by $870m, says AWD Alliance
  23. ↑ Andrew, AWD, Hobart, MFU or DDGH – What's in a name?

References

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