The Anzac class originated from RAN plans to replace the six River-class destroyer escorts with a mid-capability patrol frigate.^[1][2][3] The Australian shipbuilding industry was thought to be incapable of warship design, so the RAN decided to take a proven foreign design and modify it.^[1][3] Around the same time, the Royal New Zealand Navy (RNZN) was looking to replace four Leander-class frigates; a deterioration in New Zealand-United States relations, the need to improve alliances with nearby nations, and the commonalities between the RAN and RNZN ships' requirements led the two nations to begin collaborating on the acquisition in 1987.^[4][5] Tenders were requested by the Anzac Ship Project at the end of 1986, with 12 ship designs (including an airship) submitted.^[1][6] By August 1987, the tenders were narrowed down in October to Blohm + Voss's MEKO 200 design, the M class (later Karel Doorman class) offered by Royal Schelde, and a scaled-down Type 23 frigate proposed by Yarrow Shipbuilders.^[5][7] In 1989, the Australian government announced that Melbourne-based shipbuilder AMECON (which became Tenix Defence) would build the modified MEKO 200 design.^[3][5][7] The Australians ordered eight ships, while New Zealand ordered two, with an unexercised option for two more.^[8][9]

The Anzacs are based on Blohm + Voss' MEKO 200 PN (or Vasco da Gama class) frigates, modified to meet Australian and New Zealand specifications and maximise the use of locally built equipment.^[10][3] Each frigate has a 3,600-tonne (3,500-long-ton; 4,000-short-ton) full load displacement.^[11] The ships are 109 metres (358 ft) long at the waterline, and 118 metres (387 ft) long overall, with a beam of 14.8 metres (49 ft), and a full load draught of 4.35 metres (14.3 ft).^[11] A Combined Diesel or Gas (CODOG) propulsion machinery layout is used, with a single, 30,172-horsepower (22,499 kW) General Electric LM2500-30 gas turbine and two 8,840-horsepower (6,590 kW) MTU 12V1163 TB83 diesel engines driving the ship's two controllable-pitch propellers.^[11][3] Maximum speed is 27 knots (50 km/h; 31 mph), and maximum range is over 6,000 nautical miles (11,000 km; 6,900 mi) at 18 knots (33 km/h; 21 mph); about 50% greater than other MEKO 200 designs.^[11][3][12] The standard ship's company of an Anzac consists of 22 officers and 141 sailors.^[11]

As designed, the main armament for the frigate is a 5-inch 54 calibre Mark 45 gun, supplemented by an eight-cell Mark 41 vertical launch system (for RIM-7 Sea Sparrow or RIM-162 Evolved Sea Sparrow missiles), two 12.7-millimetre (0.50 in) machine guns, and two Mark 32 triple torpedo tube sets (initially firing Mark 46 torpedoes, but later upgraded to use the MU90 Impact torpedo).^[11][3][13] They were also designed for but not with a close-in weapons system (two Mini Typhoons fitted when required from 2005 onwards), two quad-canister Harpoon anti-ship missile launchers (which were installed across the RAN vessels from 2005 onwards), and a second Mark 41 launcher (which has not been added).^[3][14][15] The Australian Anzacs use a Sikorsky S-70B-2 Seahawk helicopter; plans to replace them with Kaman SH-2G Super Seasprites were cancelled in 2008 due to ongoing problems.^[3][16][17]

Warramunga was laid down at Williamstown, Victoria on 26 July 1997.^[8] The ship was assembled from six hull modules and six superstructure modules; the superstructure modules were fabricated in Whangarei, New Zealand, and hull modules were built at both Williamstown and Newcastle, New South Wales, with final integration at Williamstown.^[3] She was launched on 23 May 1998, and commissioned into the RAN on 31 March 2001.^[8] On commissioning, the ship was assigned to Fleet Base West.^[18] Had the New Zealand government exercised their option for two more frigates, Warramunga was one of the ships that would have been designated for the RNZN.^[19]

On 31 July 2006, Warramunga departed Fleet Base West for her first deployment to the Persian Gulf as part of Operation Catalyst, taking over duties from HMAS Ballarat.^[20] While on station in the Gulf, Warramunga conducted 150 boardings and security patrols, 320 flying hours were logged by her embarked Seahawk helicopter, and 450 investigative queries of merchant vessels were made.^[20] Warramunga returned to Fremantle on 2 February 2007 after 186 days at sea.^[20]

On 29 May 2009, it was announced that Warramunga would be re-tasked with protecting civilian vessels from piracy in Somali waters.^[21] The ship was assigned to Combined Task Force 151, which was tasked with preventing pirate attacks on commercial vessels in the shipping lanes off the Horn of Africa and Somalia.^[21]

During July and August 2010, Warramunga was one of three RAN ships to participate in the RIMPAC 2010 multinational exercise.^[22] During RIMPAC, the frigate participated in the sinking of the decommissioned amphibious assault ship USS New Orleans, firing several rounds from her main gun.^[22]

Warramunga was the fourth ship of the class to undergo the Anti-Ship Missile Defence (ASMD) upgrade.^[23] The upgrade occurred across 2014 and early 2015, the upgrade included the fitting of CEA Technologies' CEAFAR and CEAMOUNT phased array radars, on new masts, a Vampir NG Infrared Search and Track system, and Sharpeye Navigational Radar Systems, along with improvements to the operations room equipment and layout.^[24][23] As well as the ASMD upgrade, Warramunga was the first ship of the RAN to be painted with the polysiloxane-based Haze Grey paint, which has greater durability and infrared-reflection capabilities than the Storm Grey polyurethane paint used for the previous 60 years.^[23] A new ship's company (that of sister ship Parramatta, which was docked for upgrading) was assigned on 31 March 2015, and the ship was relaunched on 8 April.^[23] On reentering service, the ship's homeport was changed to Fleet Base East, where she arrived on 2 September.^[18]

In November 2017, Warramunga deployed to the Middle East as part of a combined Australian and Canadian task force. The ship carried out patrol activities in the Arabian Sea until late May 2018, intercepting and boarding 13 vessels suspected of drug trafficking. A total of 28 tonnes of heroin and hashish were seized by Warramunga's crew during these operations.^[25]

Warramunga participated in RIMPAC 2022.^[26]

On 7 April 2024, Warramunga conducted a joint patrol in the South China Sea with BRP Antonio Luna and BRP Valentin Diaz of the Philippine Navy, USS Mobile of the US Navy, and JS Akebono of the Japan Maritime Self-Defense Force. This marked the first multinational patrol between the nations.^[27]

Books

• Fairall-Lee, Sam; Miller, Kate; Murphy, David (2007). "The Royal Australian Navy in 2030". In Andrew Forbes (ed.). Sea Power: Challenges Old and New. Ultimo, NSW: Halstead Press. ISBN 978-1-920831-44-8.
• Greener, Peter (2009). Timing is everything: the politics and processes of New Zealand defence acquisition decision making. Canberra Papers on Strategy and Defence. Vol. 173. Canberra, ACT: ANU E Press. ISBN 978-1-921536-65-6. Archived from the original on 7 April 2011. Retrieved 1 September 2011.
• Jones, Peter (2001). "A Period of Change and Uncertainty". In Stevens, David (ed.). The Royal Australian Navy. The Australian Centenary History of Defence (vol III). South Melbourne, VIC: Oxford University Press. ISBN 0-19-555542-2. OCLC 50418095.
• Sharpe, Richard, ed. (1998). Jane's Fighting Ships 1998–99 (101st ed.). Coulsdon, Surrey: Jane's Information Group. ISBN 0-7106-1795-X. OCLC 39372676.
• Wertheim, Eric, ed. (2007). The Naval Institute Guide to Combat Fleets of the World: Their Ships, Aircraft, and Systems (15th ed.). Annapolis, MD: Naval Institute Press. ISBN 978-1-59114-955-2. OCLC 140283156.

Journal articles

• Fish, Tim; Grevatt, Jon (24 June 2008). "Australia's HMAS Toowoomba test fires MU90 torpedo". Jane's Navy International. Jane's Information Group.
• Grazebrook, A.W. (1 November 1996). "Anzac frigates sail diverging courses". Jane's Navy International. 101 (9). Jane's Information Group.
• Grazebrook, A.W.; Lok, Joris Janssen (1 April 1997). "RAN sets course to crack the WIP for ANZAC frigates". Jane's Navy International. 102 (3). Jane's Information Group.
• Jon, Grevatt (5 March 2008). "Australia cancels troubled Super Seasprite programme". Jane's Defence Industry. Jane's Information Group.
• Scott, Richard (16 December 2005). "Updating ANZACs to meet changed strategic posture". Jane's Navy International. Jane's Information Group.
• Scott, Richard (12 December 2007). "Enhanced small-calibre systems offer shipborne stopping power". International Defence Review. Jane's Information Group.
• "ASMD Upgrade commences on Perth". The Navy. 72 (2). The Navy League of Australia: 16–17. April 2010.

News articles

• "Another blow for traffickers". Navy News. Vol. 61, no. 9. 31 May 2018. p. 2.
• Border, Andrew (24 September 2015). "New home for Warramunga". Navy News. Royal Australian Navy. p. 11. Retrieved 23 September 2015.
• Forbes, Mark (17 June 2002). "How a helicopter deal flew into trouble". The Age. Fairfax Media. Archived from the original on 2 November 2012. Retrieved 20 September 2011.
• Henderson, Marc (23 April 2015). "New-look, new crew". Navy News. Royal Australian Navy. p. 8. Retrieved 20 April 2015.
• McPhedran, Ian (29 May 2009). "Navy warship and RAAF spy planes join fight against Somali pirates". The Daily Telegraph. Archived from the original on 13 September 2009. Retrieved 29 October 2011.
• McPhedran, Ian (20 July 2010). "Aussie ships battle US Navy – and win, even if it is just an exercise". The Daily Telegraph. Archived from the original on 5 December 2010. Retrieved 3 December 2010.

Press releases

• "HMAS Warramunga returns to Fremantle after six months in the Persian Gulf" (Press release). Department of Defence. 2 February 2007. Retrieved 29 October 2011.

• Royal Australian Navy webpage for HMAS Warramunga (II))