page_title: Anzac-class frigate
section_title: New Zealand modifications
hierarchical_section_title: Anzac-class frigate / Modifications and improvements / New Zealand modifications
caption_attribution_description: English: 080527-N-8539M-929 PERSIAN GULF (May 27, 2008) An SH-2G Super Sea Sprite takes off from the flight deck of the New Zealand Anzac-class ship HMNZS Te-Mana (F 111) supporting Operation Stakenet, a Combined Task Force 152 operation focused on ensuring a lawful maritime order in the Persian Gulf and involved units from Bahrain, New Zealand, U.K., the U.S. and other regional countries.
context_page_description: The Anzac class is a ship class of ten frigates; eight operated by the Royal Australian Navy and two operated by the Royal New Zealand Navy. During the 1980s, the RAN began plans to replace the River-class destroyer escorts with a mid-capability patrol frigate, and settled on the idea of modifying a proven foreign design for Australian conditions. Around the same time, the RNZN was seeking to replace their Leander-class frigates while maintaining blue-water capabilities. A souring of relations between New Zealand and the United States of America in relation to New Zealand's nuclear-free zone and the ANZUS security treaty prompted New Zealand to seek improved ties with other nations, particularly Australia. As both nations were seeking warships of similar capabilities, the decision was made in 1987 to collaborate on their acquisition. The project name is taken from the Australian and New Zealand Army Corps of the First World War.
  Twelve ship designs were tendered in 1986. By 1989, the project had selected a proposal by Germany's Blohm + Voss, based on their MEKO 200 design, to be built in Australia by AMECON at Williamstown, Victoria.
context_section_description: As soon as the New Zealand Anzacs entered service, a Phalanx CIWS weapons system, recycled from decommissioning various Leander frigates, was fitted to each new frigate in addition to the Mark 32 torpedo tube sets.
  In 1997, the RNZN began steps to acquire five Kaman SH-2G Super Seasprite helicopters for the two frigates. Unlike the Australians, the New Zealand contract specified new-build helicopters. Kaman Aerospace loaned four SH-2F Seasprites to the RNZN while the new helicopters were constructed: the SH-2Fs operated from February 1998 to August 2001, when the first two SH-2Gs were accepted into service.
  At the end of 2006, the RNZN placed an order for two Mini Typhoons for each of its Anzac-class frigates. Unlike the Australian configuration, the New Zealand ships are only fitted with a single TopLite director.
  In 2007, Te Kaha began undergoing a series of major upgrades as part of the four-stage Platform Systems Upgrade (PSU), planning for which started in 2004. The four areas of modification under the PSU were improved stability and compartment configuration changes, overhaul of the propulsion system, installation of a new integrated platform management system (IPMS), and upgrades to onboard environmental control. The stability upgrades were to accommodate predicted increases in displacement as updated equipment was installed on the ships. As part of the modification, the ships' quarterdecks were partially enclosed, creating space for a gymnasium and improved laundry facilities. Propulsion changes are primarily focused around replacing the TB83 diesel engines with the TB93, providing an additional 1.4 megawatts (1,900 hp) and higher speeds during diesel-only sailing. The IPMS replacement is prompted by the perceived obsolescence of the current system by 2013; as of 2009, tendering for the new system was underway. The environmental control upgrade is intended to improve personnel comfort during deployments to South East Asia, the Middle East, or similar climates, and will use more environmentally friendly products. Each stage of the upgrade is organised to occur simultaneously with ship maintenance dockings, with the first two upgrades being installed during each ship's major maintenance docking in 2009 and 2010 respectively, then the other two upgrades during the next docking in the 2011–2012 period.
  A series of austere upgrades were approved on 14 April 2014, at an original contract cost of NZ 446m under the ANZAC Frigate Systems Upgrade (FSU) programme. These include the replacement of the existing combat management system, with a system modelled on that of the much larger RCN Halifax anti submarine frigates awarded to Lockheed Martin, but without the modern US anti-ship and AA, Harpoon, ESMS Sparrow, Phased Array and multi target processing of the Halifax or RAN Anzac upgrades. Instead, the British Sea Ceptor anti-air missile replaced the Sea Sparrow on 27 May 2014. Other changes included the Norwegian Penguin Mk 3 on ex-USN/RAN Seasprite helicopters for anti ship deterrence and the fitting of a Sea Sentor Surface Ship Torpedo Defence, or SSTD system. A new inertial navigation positioning system (Northrop Grumman) and navigation radar would be fitted. The Lockheed Martin combat management system in the RNZN frigates, increases the eyes on each screen, covering lesser sensors and crew. The original sonar and underwater telephone upgrades are limited.
  The New Zealand Treasury considers the RNZN Anzac upgrade to be 'high risk', in terms of controllable cost. Concerns include the fact that the contracted shipyard in Victoria, BC has no prior experience working on Anzac-class frigates and a haphazard selection of upgrade components, to maintain only a very basic frigate capability, despite the limitations of a two frigate force. According to Robert Ayson of Victoria University, these concerns have been borne out by the cost and time extension of the refit, which commenced on Te Kaha on 1 May 2018 and Te Mana on 5 May 2019. While the physical installation of new combat systems was completed on schedule, the return of 
caption: An SH-2G Super Seasprite taking off from Te Mana in 2008
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