Minesweepers of the Royal New Zealand Navy

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Historic ships of the
Royal New Zealand Navy

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Commissioned minesweepers and danlayers of the Royal New Zealand Navy (RNZN) from its formation on 1 Oct 1941 to the present. The RNZN was created two years into World War II. For coherence this article covers the war years from the start, and thus includes also the New Zealand minesweepers operating from the beginning of the war.

Contents 1 World War II minesweepers 1.1 Naval trawlers 1.1.1 Castle class 1.1.2 Bird class 1.1.3 Isles class 1.2 Other types 1.2.1 Converted trawlers 1.2.2 Converted merchant boats 1.2.3 Danlayers 1.3 COMSOPAC 1.4 The 25th Minesweeping Flotilla 2 Post war 2.1 Ton class 3 See also 4 Notes 5 References 6 Further reading 7 External links

[edit] World War II minesweepers

During World War II the RNZN operated 39 minesweepers and danlayers. This included 20 naval trawlers (13 Castle class, 3 Bird class and 4 Isles class), 5 converted trawlers, 10 converted merchant boats and 4 danlayers.

[edit] Naval trawlers

Naval trawlers were trawlers purpose built to Admiralty specification to operate as minesweepers and/or anti-submarine boats.

[edit] Castle class

Trirteen Castle class naval trawlers were commissioned. Apart from James Cosgrove and Wakakura, all were built in New Zealand, circa 1942. They were 135 foot long, displaced 540 tons standard, and could manage 10 knots. They had a complement of about 32.

Name	Pnd	Builder	Dates	Career	Fate
HMNZS Aroha	T24	Stevenson & Cook, Port Chalmers	1943-1945	Served at Auckland [1]
HMNZS Awatere	T25	Patent Slip, Wellington	1943-1945	Served at Wellington
HMNZS Hautapu	T26	Stevenson & Cook, Port Chalmers	1943-1947	Served in Lytteton
HMNZS Hinau	T17	Senior Foundry Co., Auckland	1942-1945	LL Flotilla AS
HMNZS James Cosgrove	T10		1941-1944
HMNZS Maimai	T27	Stevenson & Cook, Port Chalmers	1943-1946	Served at Wellinton
HMNZS Manuka	T19	Mason Bros, Auckland	1942-1945	LL Flotilla AS
HMNZS Pahau	T28	Stevenson & Cook, Port Chalmers	1944-1945	Served in Wellington
HMNZS Rimu	T18	Seager Bros Shipbuilders Ltd	1942-1945	LL Flotilla AS
HMNZS Waiho	T34	Stevenson & Cook, Port Chalmers	1944-1946	Served in Auckland
HMNZS Waima	T33	Stevenson & Cook, Port Chalmers	1944-1946	Served in Lytteton
HMNZS Waipu	T32	Stevenson & Cook, Port Chalmers	1943-1946	Served in Auckland
HMNZS Wakakura	T00		1941-1947	1926-1941 was HMS Wakakura in the New Zealand Division of the Royal Navy. Used as danlayer from July 1944.

In addition two further Castle trawlers, Tawhai and Waikato, were completed in 1946 but were not commissioned.

[edit] Bird class

On 29 Jan 1943, in a classic duel, Kiwi and Moa rammed and wrecked the Japanese submarine I-1.

The Bird class naval trawlers were 168 foot long, displaced 923 tons full load, and could manage 13 knots. They had a complement of 33-35 and were armed with one 4 inch gun, 2x1 Hotchkiss guns, twin Lewis guns and 40 depth charges. They were equipped with asdic.

Name	Dates	Career	Notes
HMNZS Kiwi (T102)	1941-1946 1948-1949 1951-1956	AS MS Training ship Training ship
HMNZS Moa (T233)	1941-1943	AS MS	Sunk by enemy aircraft on 7 Apr 1943 near Tulagi Harbour in the Solomon Islands. Five crew men were lost.
HMNZS Tui (T234)	1941-1946 1952-1955 1956-1967	AS MS Training ship Research ship	On 19 August 1943 Tui and some US Kingfisher float-planes jointly sank the Japanese submarine I-17.

[edit] Isles class

The Isles class naval trawlers were 164 foot long, displaced 740 tons full load, and could manage 12 knots. The had a complement of 40 and were armed with one 12-pdr gun, three 20 mm Oerlikons (3x1) and depth charges.

Name	Dates	Career	Fate
HMNZS Inchkeith (T155)	1941-1946
HMNZS Killegray (T174)	1941-1946
HMNZS Sanda (T160)	1941-1946
HMNZS Scarba (T175)	1941-1946

[edit] Other types

[edit] Converted trawlers

Name	Dates	Career	Fate
HMNZS Futurist (T12)	1941-1944	Functioned as a boom gate vessel 1944
HMNZS Humphrey (T12)	1941-1944
HMNZS Kapuni (T15)	1941-1945	Functioned as supply ship 1945
HMNZS South Sea (T22)	1941-1942		Sunk 19 Dec 1942
HMNZS Thomas Currell (T11)	1941-1944

[edit] Converted merchant boats

Name[2]	Dates	Career	Fate
HMNZS Breeze (T02)	1942-1944
HMNZS Dutchess (T06)	1940-1945	examination vessel 1942-45 liberty launch 1945
HMNZS Gale (T04)	1941-1944
HMNZS Hawea (T16)	1941-1945	Functioned as supply ship in 1945.
HMNZS Kapuni (T15)	1941-1945	Functioned as patrol boat 1940 and supply ship 1944-45.
HMNZS Matai (T01)	1941-1946	Functioned as transport ship 1945-1946.
HMNZS Muritai (T05)	1941-1946	Functioned as training and cable-lifting ship 1945-1946.
HMS Puriri (T02)	1941	Puriri was sunk just before the creation of the RNZN.	14 May 1941 struck a German mine 9 miles NE of the Whangarei heads and sunk with the loss of 5 crew members.
HMNZS Rata (T03)	1941-1943
HMNZS Viti (T?)	1941-1945

[edit] Danlayers

Name	Type	Dates	Career	Fate
HMNZS Coastguard (T12)	Converted trawler	1941-1960	Functioned as a stores ship 1945-1960
HMNZS Kaiwaka (T14)	Converted merchant ship	1941-1945
HMNZS Nora Niven (T23)	Converted trawler	1941-1944
HMNZS Phyllis T22	Converted trawler	1943-1944

[edit] COMSOPAC

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  Wiliam Halsey sweared as ComSoPac-Nov42

COMSOPAC is an acronym for Commander South Pacific.

During World War II, one of the major United States theatre commands was the command of the South Pacific Area. This command was usually referred to as COMSOPAC (COMmander SOuth PACific)

It was formed in April 1942 as a subordinate command of Pacific Ocean Areas, commanded by Robert L. Ghormley through October 1942, William Halsey, Jr. to June 1944, John H. Newton to March 1945, and Admiral William L. Calhoun to the end of the war.

In June 1942 New Zealand passed the operational control of most of its South Pacific naval forces to COMSOPAC. This continued until COMSOPAC released control in June 1945.

The headquarters for COMSOPAC were initially located in Auckland, New Zealand. In July 1942 they were transferred to Nouméa, New Caledonia,

[edit] The 25th Minesweeping Flotilla

In the early months of WWII the New Zealand minesweepers had no formal grouping as a flotilla Then Niagra was sunk in June 1940. On 18 July 1940 the Naval Board designated the First Group for coastal minesweeping, and allocated Port minesweepers to the main ports. They were:^[3]

On 14 November 1940, a few weeks after the founding of the Royal New Zealand Navy, they were reorganised as the First Minesweeping Flotilla (NZ)

Then on 23 December 1940 the Port minesweepers were separated, and the remaining minesweepers were organised into the 25th Minesweeping Flotilla. This name aligned with the flotilla names used by the Royal Navy. The makeup of this flotilla changed during the course of the war, as new minesweepers were commissioned, others sunk or withdrawn for repairs or refitting, and requirements changed.

Here is a snapshot of the 25th Minesweeping Flotilla on 27 March 1943:

The Port minesweepers were organised into their own flotillas. Eleven new Castle class minesweepers joined the Port flotillas on completion, 1943-44.

[edit] Post war

[edit] Ton class

The RNZN operated two Ton class minesweepers on anti-infiltration patrols in Malaysian coastal waters during 1966 and 1967. They are the only commissioned RNZN ships never to have visited NZ.

Name	Dates	Career	Fate
HMNZS Santon (M1178)	1965-1966		1967 sold to Argentina and renamed ARA Chubat (M3)
HMNZS Hickleton (M1131)	1965-1966		1967 sold to Argentina and renamed ARA Neuquen (M1)

These Admiralty designed coastal minesweepers were built with composite hulls of wood on aluminium frames and a minimum of magnetic material in the hull. They were intended to meet the threat of seabed mines laid in shallow coastal waters. Their shallow draft gave them some protection against pressure and contact mines, and allowed them to navigate in shallow inshore waters. They were 153 feet long, displaced 360 tons standard, could manage 15 knots, and had a complement of 32. They were named after British villages which ended with "ton".

Early in 1965 Indonesia was employing a policy of confrontation against Malaysia. New Zealand agreed to assist Malaysia by deploying two Royal Navy minesweepers then in reserve at Singapore. These were commissioned into the RNZN on 10 April 1965 and joined the Royal Navy's 11th Minesweeping Squadron (also Ton class), taking part part in anti-infiltration patrols in Malaysian waters.

In their first year they carried out 200 patrols, with 20 incidents involving intruding Indonesians, often taking as prisoners those aboard intercepting small craft. By the time the Indonesian confrontation policy ended in August 1966 Hickleton and Santon had jointly steamed 130,000 miles.

[edit] See also

• Anti-submarine warfare
• Coastal Forces of the Royal New Zealand Navy
• RNZN Fairmiles in the Solomons

[edit] Notes

[edit] References

• McDougall, R J (1989) New Zealand Naval Vessels. Page 54-84. Government Printing Office. ISBN 9780477013994
• Waters, Sydney David (1956) The Royal New Zealand Navy, Historical Publications Branch, Wellington:

[edit] Further reading

• Burgess, Michael (1981)The Royal New Zealand Navy: A Pictorial History. Allied Press Ltd. ISBN 9780908641253 (many pictures of New Zealand minesweepers)
• Harker, Jack (2000)The Rockies: New Zealand Minesweepers at War. Silver Owl Press. ISBN 0959797998
• Harker, Jack S (2001) The birth and growth of the Royal New Zealand Navy. Pentland. ISBN 1858218047
• Harker, Jack S. (2006) Left hand down a bit! : the Wakakura story. Kotuku Media. ISBN 0908967047
• Johnston, James Ian (2005) Face with Fortitude. Ianswork Publishers. ISBN 0473100118
• Wright, Gerry (2006) A Kiwi on our Funnel : The story of HMNZ ships Hickleton and Stanton. Zenith Print and Design. ISBN 04731008224

[edit] External links