The Royal New Zealand Navy (RNZN; ) is the maritime arm of the New Zealand Defence Force. The fleet currently consists of eight ships. The Navy had its origins in the Naval Defence Act 1913, and the subsequent acquisition of the cruiser , which by 1921 had been moored in Auckland as a training ship. A slow buildup occurred during the interwar period, and then in December 1939, fought alongside two other Royal Navy cruisers at the Battle of the River Plate against the German ship, Graf Spee.

History

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.Much of this discussion is taken from "RNZN History" . RNZN Official Website. Accessed 15 April 2006. 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.McGibbon, Ian (2000). The Oxford Companion to New Zealand Military History. Auckland: Oxford University Press. , pp.45–46 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.The Royal New Zealand Navy, Official History of New Zealand in the Second World War, "Chapter 2: Outbreak of War: Cruise of HMS Achilles" , Historical Publications Branch, Wellington, 1956. 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, in recognition of the fact that the naval force was now largely self-sufficient and independent of the Royal Navy. The Prime Minister Peter Fraser reluctantly agreed, though saying "now was not the time to break away from the old country". Ships thereafter were prefixed HMNZS (His/Her Majesty's New Zealand Ship).

escorted the New Zealand Expeditionary Force to the Middle East in 1940 and was then deployed in the Mediterranean, the Red Sea, and the Indian Ocean. Leander was subjected to air and naval attack from Axis forces, conducted bombardments, and escorted convoys. In February 1941, Leander sank the Italian auxiliary cruiser in the Indian Ocean. In 1943, after serving further time in the Mediterranean, Leander returned to the Pacific Ocean. She assisted in the destruction of the and was seriously damaged by torpedoes during the Battle of Kolombangara. The extent of the damage to Leander saw her docked for repairs until the end of the war.

As the war progressed, the size of the RNZN greatly increased, and by the end of the war, there were over 60 ships in commission. These ships participated as part of the British and Commonwealth effort against the Axis in Europe, and against the Japanese in the Pacific. They also played an important role in the defence of New Zealand, from German raiders, especially when the threat of invasion from Japan appeared imminent in 1942. Many merchant ships were requisitioned and armed for help in defence. One of these was , which saw action against the off Fiji in 1942. In 1941–1942, it was decided in an agreement between the New Zealand and United States governments that the best role for the RNZN in the Pacific was as part of the United States Navy, so operational control of the RNZN was transferred to the South West Pacific Area command, and its ships joined United States 7th Fleet taskforces.

In 1943, the light cruiser was transferred to the RNZN as HMNZS Gambia. In November 1944, the British Pacific Fleet, a joint British Commonwealth military formation, was formed, based in Sydney, Australia. Most RNZN ships, including Gambia and Achilles, were transferred to the BPF. They took part in the Battle of Okinawa and operations in the Sakishima Islands, near Japan. In August 1945, HMNZS Gambia was New Zealand's representative at the surrender of Japan.

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.Korean Scholarships – Navy Today, Defence Public Relations Unit Issue 133, 8 June Pages 14-15

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)"Coalition Air Warfare in the Korean War, 1950–1953": Proceedings, Air Force Historical Foundation Symposium, Andrews AFB, Maryland, 7–8 May 2002, 142 onwards 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."Rear Admiral J.E.N. Welch, former Chief of Naval Staff, "The Critical Size of Our Combat Fleet," Centre for Strategic Studies New Zealand, “Papers on the Interim Report of the Defence Beyond 2000 Inquiry of the Parliamentary Select Committee on Foreign Affairs, Defence and Trade: From the Seminar of New Zealand’s Defence” (Wellington: Centre for Strategic Studies, April 15, 1999).

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 Otago, 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."Welch, "The Critical Size of Our Combat Fleet."

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.Ex RNZN Navy Club – HMNZS Canterbury 1981/82 Commission

Post-Cold War