Pre–World War I The first recorded maritime combat activity in New Zealand occurred off the northern tip of the
South Island in December 1642.
Māori in
war canoes attacked and killed four seamen from
Abel Tasman's party, who were at the time in low boats between the main ships. The New Zealand Navy did not exist as a separate military force until 1941. The association of the
Royal Navy with New Zealand began with the arrival of
James Cook in 1769, who completed two subsequent journeys to New Zealand in 1773 and 1777. Occasional visits by Royal Navy ships were made from the late 18th century. The Royal Navy played a part in the
New Zealand Wars: for example, a gunboat shelled fortified Māori
pā from the Waikato River in order to defeat the
Māori King Movement.
World War I and the inter-war period In 1909 the New Zealand government decided to fund the purchase of the
battlecruiser for the Royal Navy, which saw action throughout World War I in Europe. The passing of the
Naval Defence Act 1913 created the
New Zealand Naval Forces, still a part of the Royal Navy. The first ship given by the British government for the New Zealand Naval Forces was the
cruiser , which escorted New Zealand land forces to
occupy the German colony of Samoa in 1914.
Philomel saw further action under the command of the Royal Navy in the Mediterranean, the
Red Sea, and the
Persian Gulf. By 1917 she was worn out and was sent back to New Zealand where she served as a depot ship in
Wellington Harbour for minesweepers. In 1921 she was transferred to Auckland for use as a training ship. The New Zealand Naval Forces passed to the control of
Commander-in-Chief, China, after the Royal Navy forces in Australia came under Canberra's control in 1911. From 1921 to 1941 the force was known as the
New Zealand Division of the Royal Navy. The cruiser
Chatham along with the sloop
Veronica arrived in 1920,
Philomel was transferred to the Division in 1921, as was the sloop
Torch, arrived in 1922 and then in 1924. and the minesweeper arrived in 1926. Between World War I and World War II, the New Zealand Division operated a total of 14 ships, including the cruisers (joined 31 March 1937) and , which replaced
Diomede and
Dunedin (replaced by
Leander in 1937).
World War II When Britain went to war against Germany in 1939, New Zealand officially declared war at the same time, backdated to 9.30 pm on 3 September local time. But the gathering in Parliament in
Carl Berendsen's room (including
Peter Fraser) could not follow Chamberlain's words because of static on the shortwave and waited until the Admiralty notified the fleet that war had broken out before Cabinet approved the declaration of war (the official telegram from Britain was delayed and arrived just before midnight). participated in the first major naval battle of World War II, the
Battle of the River Plate off the
River Plate estuary between
Argentina and
Uruguay, in December 1939.
Achilles and two other cruisers, and , severely damaged the German
pocket battleship Admiral Graf Spee. The German Captain
Hans Langsdorff then scuttled
Graf Spee rather than face the loss of many more German seamen's lives.
Achilles moved to the Pacific, and was working with the
United States Navy (USN) when damaged by a Japanese bomb off
New Georgia. Following repair, she served alongside the
British Pacific Fleet until the war's end. The New Zealand Division of the Royal Navy became the Royal New Zealand Navy (RNZN) on 1 October 1941,
Post-World War II During April 1947
a series of non-violent mutinies occurred amongst the sailors and non-commissioned officers of four RNZN ships and two shore bases. Overall, up to 20% of the sailors in the RNZN were involved in the mutinies. The resulting manpower shortage forced the RNZN to remove the light cruiser , one of their most powerful warships, from service and set the navy's development and expansion back by a decade. Despite this impact, the size and scope of the events have been downplayed over time. RNZN ships participated in the
Korean War. On 29 June, just four days after 135,000
North Korean troops crossed the 38th parallel in
Korea, the New Zealand government ordered two frigates – and to prepare to make for Korean waters, and for the whole of the war, at least two NZ vessels would be on station in the theatre. On 3 July these two first ships left
Devonport Naval Base,
Auckland and joined other
Commonwealth forces at
Sasebo, Japan, on 2 August. These vessels served under the command of a British flag officer (seemingly
Flag Officer Second in Command Far East Fleet) and formed part of the
US Navy screening force during the
Battle of Inchon, performing shore raids and inland bombardment. Further RNZN
Loch-class frigates joined these later – , , and , as well as a number of smaller craft. Only one RNZN sailor was killed during the conflict – during the Inchon bombardments. The Navy later participated in the
Malayan Emergency. In 1954 a New Zealand frigate,
HMNZS Pukaki, carried out a bombardment of a suspected guerilla camp, while operating with the
Royal Navy's
Far East Fleet – the first of a number of bombardments by RNZN ships over the next five years.
Jack Welch, later to become
Chief of Naval Staff decades later, wrote that in 1959, the RNZN "was still very much part of the
Royal Navy supported by New Zealand tax-payers. The officer corps and senior specialist ratings were very dependent on loan and exchange RN personnel, while our own [New Zealand] officers and senior ratings were almost exclusively trained in the UK. We simply borrowed the RN's administrative regulations and amended them to local conditions. The Empire was alive and well. Operationally we were still very strongly tied to the UK." Later the Navy return to Malayan waters during the
Indonesia-Malaysia confrontation. These operations were the RNZN's last large-scale operation with the Royal Navy. In a security crisis and threat to Malaysia and Sarawak and Brunei, two-thirds of the Royal Navy's operational warships were deployed from 1963 to the end of 1966 with , , and , heavily involved in boarding ships, shore patrols, presence, maintaining the use of seaways and support of the RN's amphibious carriers. The commitment, wrote Welch, "involved the whole fleet, as ships rotated though
Pearl Harbor for workup with the USN before deploying on to the Far East to relieve ships on station." Until the 1960s the RNZN had, in common with other
Dominion navies, flown the
White Ensign as a common ensign. After 1945, the foreign policies of the now-independent states had become more distinctive. There was a growing wish and a need for separate identities, particularly if one Dominion was engaged in hostilities where another was not. Thus, in 1968, the RNZN adopted its own ensign, which retained the
Union Flag in a top quarter but replaces the
St George's Cross with the
Southern Cross constellation that is displayed on the national flag. Since 1946 the Navy has policed New Zealand's
territorial waters and
exclusive economic zone for fisheries protection. It also aids New Zealand's scientific activities in Antarctica, at
Scott Base. One of the best-known roles that the RNZN played on the world stage was when the frigates and were sent by the
Labour Government of
Norman Kirk to
Moruroa Atoll in 1973 to protest against French
nuclear testing there. The frigates were sent into the potential blast zone of the weapons, where both ships witnessed one airburst test each which forced France to then change to underground testing. In May 1982 Prime Minister
Rob Muldoon seconded the frigate
Canterbury to the Royal Navy for the duration of the
Falklands War.
Canterbury was deployed to the
Armilla Patrol in the
Persian Gulf, to relieve a British frigate for duty in the South Atlantic.
Canterbury was herself relieved by in August.
Post-Cold War At the close of the
Cold War the RNZN had an escort force of four frigates (, , , and
HMNZS Southland (F104)). Due to the cost of replacing four ships, the force was downsized to two. However, there was considerable political debate at times during the mid-1990s about whether a third and fourth
Anzac-class frigate should be procured. Since the 1990s, the RNZN has operated in the Middle East on numerous occasions. RNZN ships played a role in the
Iran–Iraq War, aiding the Royal Navy in protecting neutral shipping in the Indian Ocean. Frigates were also sent to participate in the first
Gulf War, and
Operation Enduring Freedom. The RNZN has also played an important part in conflicts in the Pacific. Naval forces were utilised in the
Bougainville,
Solomon Islands and
East Timor conflicts of the 1990s. The RNZN often participates in
United Nations peacekeeping operations. The hydrographic survey ship of the RNZN until 2012 was , succeeding the long-serving .
Resolution was used to survey and chart the sea around New Zealand and the Pacific Islands. A small motor boat, SMB
Adventure, was operated from
Resolution.
Resolution carried some of the most advanced survey technology available. HMNZS
Resolution was decommissioned at Devonport Naval Base on 27 April 2012, and was replaced by , which was commissioned on 7 June 2019. In October 2021 the Defence Force contributed to the
UK Carrier Strike Group's transit through the
South China Sea. This deployment sought to reiterate New Zealand's support for free international passage through the South China Sea, which has been claimed by China as part of its territorial waters. In June 2023, was confronted by two
People's Liberation Army Navy frigates, helicopters, and four other vessels near the disputed
Spratly Islands. In late September 2024
Defence Minister Judith Collins confirmed that
HMNZS Aotearoa had sailed through the disputed
Taiwan Strait with . In response, a spokesperson for the
Chinese Ministry of Foreign Affairs stated that
China "handles foreign warships' transit through the Taiwan Strait in accordance with laws and regulations". On 29 September HMNZS
Aotearoa took part in a joint maritime patrol with Australian, Filipino, Japanese and United States warships and aircraft in the disputed
South China Sea, which has also been claimed by China. On 5 October 2024
HMNZS Manawanui ran aground and sank off the coast of
Siumu, on the south coast of
Upolu island,
Samoa, while surveying a nearby reef during a storm. HMNZS
Manawanui became the first RNZN vessel to be unintentionally sunk since the Second World War and the first to be lost in peacetime. On 4 April 2025, a naval court of inquiry concluded that the warship sank due to a series of human errors and launched a disciplinary inquiry. On 19 January 2025,
Judith Collins confirmed that
Manawanui would not be replaced, with
HMNZS Otago (P148) taking on the ships role, though lacking the working space and specialised equipment. On 6 May 2025, Defence Minister Collins confirmed that the Government would allocate NZ$2 billion (US$1.2 billion) from its four-year NZ$12 billion defence funding allocation to purchasing new maritime helicopters for the Navy. On 21 August, Collins and
Foreign Minister Winston Peters announced that the Government would purchase five new
MH-60R Seahawks for the Navy. File:Naval Ensign of the United Kingdom.svg|White Ensign 1941–1968 File:Naval Ensign of New Zealand.svg|White Ensign 1968–present ==Ships and aircraft==