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|Operators={{Navy|AUS}} (planned)
|Operators={{Navy|AUS}} (planned)
|Class before=[[Daring class destroyer (1949)|''Daring'' class destroyers]] and early {{Sclass|River|destroyer escort|6}}s
|Class before=[[Daring class destroyer (1949)|''Daring'' class destroyers]] and early {{Sclass|River|destroyer escort|6}}s
|Class after= [Adelaide class frigate) and [Hobart class destroyer]
|Class after=[[Adelaide class frigate]] and [[Hobart class destroyer]]
|Subclasses=
|Subclasses=
|Built range=1975–1984 (planned)
|Built range=1975–1984 (planned)

Revision as of 01:27, 22 April 2009

An artist's impression of the light destroyer design as approved by the Government
An artist's impression of the light destroyer design as approved by the Government in August 1972
Class overview
BuildersWilliamstown Naval Dockyard (planned)
Operators Royal Australian Navy (planned)
Preceded byDaring class destroyers and early Error: {{sclass}} invalid format code: 6. Should be 0–5, or blank (help)s
Succeeded byAdelaide class frigate and Hobart class destroyer
Built1975–1984 (planned)
In commission1980 (planned)
Planned10 originally, later 3
Completed0
General characteristics
TypeLight destroyer
Displacement4,200 tons
Length425 feet (129.5 m)
Beam48 feet (14.6 m)
PropulsionTwo shafts each with one Rolls-Royce Olympus and one Rolls-Royce Tyne gas turbine[2]
Speed30 knots (56 km/h; 35 mph)
RangeUp to 6,000 miles (9,700 km)[1]
Complement210
Sensors and
processing systems		Automated combat data system[2]
Armamentlist error: <br /> list (help)
One 5"/54 caliber Mark 45 gun[2]
Six Harpoon missiles[2]
Two double-barreled close-range guns
One Mk 13 missile launcher and Standard anti-aircraft missiles
Six anti-submarine torpedoes in two triple tube mounts
Aircraft carriedTwo helicopters
Aviation facilitiesHanger and stern flight deck
NotesShip characteristics from Gillett (1988), p. 68[3]

The Australian light destroyer project aimed to build a class of small destroyers for the Royal Australian Navy (RAN). The project began in 1966 with the goal of developing simple light destroyers (DDL) to support patrol boat operations. The project was rescoped in 1969 when the Navy decided to use the ships to replace other destroyers as they retired, leading to an increase in the design's size, cost and complexity. Concerns over the ships' cost and technological risk led the government to cancel the DDL project in 1973 on the RAN's advice, and a variant of the United States' Error: {{sclass}} invalid format code: 6. Should be 0–5, or blank (help) was procured instead.

Requirement

From 1963 to 1966 RAN warships took part in the Indonesian Confrontation. During this period Australian minesweepers and frigates patrolled Malaysia's coastline to counter Indonesian infiltration parties traveling in small craft. RAN warships also bombarded Indonesian positions in East Kalimantan near the border with Malaysia on several occasions. This experience led to a perceived need for light destroyers and patrol boats which were tailored to confrontation-type tasks.[4]

When the DDL project began in 1966, the ships' role was to support patrol boats during anti-infiltration operations and complement the Navy's existing destroyer force. The intenion was that the DDLs would be fast, simply armed and smaller than conventional destroyers.[5] The plan was also to develop different DDL variants which could be built using a common hull design.[6] The RAN and British Royal Navy (RN) held discussions in 1967 on jointly developing DDLs, but the RN withdrew from the project when the RAN insisted on arming the ships with United States-designed weapons.[3][5]

File:HMAS Vendetta D08.jpg
Daring class destroyer HMAS Vendetta

The DDL design evolved during the late 1960s. During planning conducted in 1967 and 1968, it gradually became clear that the ships would replace rather than complement the Navy's three Daring class destroyers and four early River-class destroyer escorts.[3][5] Accordingly, in 1969 it was specified that the DDLs would be more capable and flexible than originally intended so that the RAN could maintain its capabilities as the older destroyers retired. The DDL's new roles were set by an agreement between the RAN and Department of Defence in 1970. This agreement specified that the DDLs were to be capable of destroying equivalent surface warships, be able to carry out maritime interdiction duties, command groups of patrol boats and aircraft, have reasonable anti-aircraft and anti-submarine capabilities and be able to provide naval gunfire support to land forces.[5]

The RAN originally intended to order up to ten DDLs.[3] All the DDLs were to be built in Australia so that local shipbuilding capabilities were maintained and Australian industry was to be involved to the greatest possible extent.[7] The original intent was that half the ships would be built at Cockatoo Island Dockyard in Sydney and half at Williamstown Naval Dockyard in Melbourne.[8]

Design

The DDL design changed considerably over the life of the project. The initial specification was for a 1,000-ton escort vessel[9] and in an early design the class was to have a single five inch gun as its primary armament and be capable of carrying a helicopter.[6] When the Navy Office later prepared an initial sketch design it was for a 2,100-ton ship with a length of 335 feet (102.1 m), a beam of 40 feet (12.2 m) and a 32-knot (59 km/h) maximum speed. These DDLs were to be armed with two five-inch guns and operate a single light helicopter.[10]

After preparing an initial sketch, the Navy contracted Yarrow Admiralty Research Division (Y-ARD) in July 1970 to complete preliminary designs for the DDLs. As an initial stage, Y-ARD was required to develop sketch designs for DDLs with six different armament configurations using a common hull.[5] Requests for tender for studies on major sub-components were also issued in 1970, and these were completed by mid-1971.[11][12]

The RAN conducted armament effectiveness studies of each of the six DDL variants in parallel with Y-ARD's development of the designs. These studies found that including an area air defence capability and an ability to operate two helicopters greatly improved the DDL's effectiveness. These features were included in the Navy's specification for the DDL design which was issued in late 1970.[13] By this time the DDL design had changed to specify a general-purpose destroyer of 4,200 tons armed with a five-inch gun and a Tartar missile launcher which was capable of operating two helicopters. The changes increased the cost of building the ships, and the number planned was reduced to three.[11] Nevertheless, the planned DDLs were very capable ships and the 1972–73 edition of Jane's Fighting Ships commented favourably on the design.[7][14]

The changes to the DDL design reflected shifting requirements and poor project management by the Navy.[9] The development of an Australian-designed ship customised for Australian conditions caused naval officers to include requirements beyond those which were essential.[12] These design changes were made without regard for costs as the team developing the DDL's specifications had no responsibility for the ships' final price and delivery schedule.[15] The Navy's failure to maintain control of the design requirements and make cost-performance trade offs may have been due to its limited experience in overseeing the design of new warships.[12]

Cancellation

Type 42 Destroyer HMS Birmingham

Despite the changes to the design and its growing costs, construction of three DDLs was approved by the McMahon Government in August 1972.[3][12] At this time the total project cost was estimated at $355 million.[16] All three ships were to be built at Williamstown Dockyard, with construction of the first ship beginning in 1975 and construction of the other ships commencing at two-yearly intervals.[9] The first ship was to be commissioned in 1980 and the third in 1984.[3] Further DDLs may also have been ordered.[17] The DDL design was not supported by the Australian Labor Party (ALP) opposition, however, which believed that they were too large and expensive for escort, patrol and surveillance duties.[18]

Increasing costs and concerns over the ships' design led to the cancellation of the DDL project. The Department of Defence observed that the DDL's costs were escalating and was unable to settle on the design's final specifications. The Navy reviewed the project and found that it was unduly expensive and a Joint Parliamentary committee concluded that a unique Australian design would entail technological risks.[19] As a result, the Navy recommended to the ALP Whitlam Government that the DDL project be cancelled, and this took place in August 1973.[12] The cost of the project to the Navy had been A$1.7 million, most of which was spent on design investigations and management consultancies.[20]

The DDL project's problems harmed the Australian shipbuilding industry. The cancellation of the DDL project and another project to develop an Australian fast combat support ship design led to a perception that technical risks needed to be minimised when selecting new warships, and that it was preferable to rely on proven foreign designs.[8][21] Australian industry was also left with a bad impression as companies involved in the project had devoted considerable resources to preparing tenders for the DDL.[22]

Adelaide class frigate HMAS Canberra

Despite canceling the DDL project, the government endorsed the RAN's requirement for new destroyer-type warships and requested a review of existing foreign designs to find a replacement.[23] The two designs subsequently considered by the Navy were the United States' Oliver Hazard Perry class frigates or a variant of the British Type 42 destroyer armed with SM-1 surface to air missiles. The project team found that the Type 42 was the only design capable of meeting the Navy's requirement, and stated that the Oliver Hazard Perry design was "a second rate escort that falls short of the DDL requirements on virtually every respect". Despite this, there were serious concerns over whether it would be possible to fit SM-1 missiles to the Type 42, and this led the government to approve the purchase of two Oliver Hazard Perry ships from the United States in April 1974. The DDL project was reviewed again when the Fraser Government came into office, but a firm order for two Oliver Hazard Perry frigates was placed in February 1976 and a third was ordered in late 1977.[23] Six of these frigates, which were designated the Error: {{sclass}} invalid format code: 6. Should be 0–5, or blank (help), were eventually ordered and the final two were built in Australia at Williamstown.[24]

Notes

  1. ^ Loxton (1973), p. 21
  2. ^ a b c d Killen (1976), p. 34
  3. ^ a b c d e f Gillett (1988), p. 68
  4. ^ Cooper (2006), pp. 198–200
  5. ^ a b c d e Loxton (1973), p. 17
  6. ^ a b Cooper (2006), p. 200
  7. ^ a b Schaetzel (1986), p. 16
  8. ^ a b Jeremy (2006), p. 201
  9. ^ a b c Jones (2006), p. 219.
  10. ^ Jeremy (2005), p. 176
  11. ^ a b Jeremy (2005), p. 177
  12. ^ a b c d e Earnshaw (1999), p. 90
  13. ^ Loxton (1973), pp. 17–19
  14. ^ Blackman (1972), p. 21
  15. ^ Senate Foreign Affairs, Defence and Trade Committee (2006), p. 43
  16. ^ Willis (1972), p. 26
  17. ^ Earnshaw (1999), p. 89
  18. ^ Earnshaw (1999), p. 91
  19. ^ Senate Foreign Affairs, Defence and Trade Committee (2006), pp. 42–43
  20. ^ "Effect on the Navy". Navy News. Royal Australian Navy. 31 August 1973. p. 2. Retrieved 22 March 2009.
  21. ^ Jeremy (2005), p. 178
  22. ^ Schaetzel (1986), p. 17
  23. ^ a b Jones (2006), p. 220
  24. ^ Jones (2006), p. 224

Bibliography

  • Blackman, Raymond V.B. (editor) (1972). Jane's Fighting Ships 1972-73. Jane's Year Books. London: Sampson, Low, Marston & Co. ISBN 354001116. {{cite book}}: |first= has generic name (help); Check |isbn= value: length (help)
  • Cooper, Alastair (2006). "1955–1972: The Era of Forward Defence". In Stevens, David (ed.). The Royal Australian Navy. A History (Paperback ed.). Melbourne: Oxford University Press. ISBN 9780195555424.
  • Department of Defence (1972). "New Australian Naval Destroyer proposal - Decision 1051 and 1090(ADHOC)". Cabinet Submission 14 June 1972. National Archives of Australia. Retrieved 22 March 2009.
  • Earnshaw, Paul (1999). "Shaping Naval Shipbuilding in Australia". In Cain, Frank (ed.). Arming the Nation. Canberra: Australian Defence Studies Centre. ISBN 0731704339.
  • Gillett, Ross (1988). Australian & New Zealand Warships Since 1946. Sydney: Child & Associates. ISBN 0867772190.
  • Jeremy, John (2005). Cockatoo Island: Sydney's Historic Dockyard. Sydney: UNSW Press. ISBN 0868408174.
  • Jeremy, John (2006). "Australian Shipbuilding and the Impact of the Second World War". In Stevens, David and Reeve, John (ed.). Navy and the Nation: The Influence of the Navy on Modern Australia. Sydney: Allen & Unwin. ISBN 1741142008.{{cite book}}: CS1 maint: multiple names: editors list (link)
  • Jones, Peter (2006). "1972–1983: Towards Self-Reliance". In Stevens, David (ed.). The Royal Australian Navy. A History (Paperback ed.). Melbourne: Oxford University Press. ISBN 9780195555424.
  • Killen, James (1976). "Submission No 85 : Destroyer acquisition - Decision 240". Cabinet Submission 6 February 1976. National Archives of Australia. Retrieved 22 March 2009.
  • Loxton, B.H. (1973). "Development of the DDL Concept". Royal Australian Navy. A Survey of Future Needs August 1972. Parliamentary Paper No. 138. Canberra: The Parliament of the Commonwealth of Australia.
  • Senate Foreign Affairs, Defence and Trade Committee (2006). Blue water ships: consolidating past achievements. Canberra: Commonwealth of Australia. ISBN 0642717362.
  • Schaetzel, Stanley S. (1986). Local Development of Defence Hardware in Australia. The Strategic and Defence Studies Centre Working Paper No. 100. Canberra: Research School of Pacific Studies, Australian National University. ISBN 0867848456.
  • Willis, G.J. (1973). "The DDL Project". Royal Australian Navy. A Survey of Future Needs August 1972. Parliamentary Paper No. 138. Canberra: The Parliament of the Commonwealth of Australia.
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