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Support Force: New Ship MANAWANUI is a dive and hydrographic vessel and will enter service in 2019.

In August 2018, the Government approved the purchase of a dive and Hydrographic support vessel for the Royal New Zealand Navy. The vessel will provide the ability for diving and Hydrographic specialists to embark and conduct specialised operations such as surveying of the coastline and harbours, underwater explosive disposal, underwater search and recovery and limited mine countermeasures. It will also contribute towards New Zealand's maritime presence around New Zealand and the South West Pacific.

Commanding Officer

Lieutenant Commander Andrew Mahoney, RNZN
Download PDF Profile (pdf, 297kb)

Our future Dive Hydro Vessel Manawanui leaves her Danish port to conduct sea trials to confirm the Navy equipment installed performs as expected

Our future Dive Hydro Vessel Manawanui leaves her Danish port (15 Mar 19) to conduct sea trials to confirm the Navy equipment installed performs as expected.


The Ministry of Defence has recently acquired a dive and hydrographic vessel to close the capability gap created with the decommissioning of the survey ship HMNZS RESOLUTION in 2012 and the dive tender HMNZS MANAWANUI in early 2018.

The new ship, which will be named HMNZS MANAWANUI (the fourth Navy ship to bear this name) will provide the Royal New Zealand Navy with the ability to conduct a range of specialist diving, salvage and hydrography tasks around New Zealand and across the South West Pacific.

MANAWANUI will deliver the ability for diving and hydrographic specialists to embark and conduct specialised operations such as surveying of lakes, coastlines and harbours, underwater explosive disposal, mine counter measures and underwater search and salvage. Possible missions for the ship will include surveying harbours and approaches after a natural disaster prior to larger support ships landing support equipment and personnel, providing support to the ongoing mission to eradicate explosive remnants of war in the South Pacific and salvage operations to find and recover submerged objects.

Contributing towards New Zealand’s maritime presence in the region, MANAWANUI will also be supporting government agencies including the Police, Customs, Ministry for Primary Industries and Ministry of Civil Defence and Emergency Management.


Purpose: Dive and Hydrographic Vessel
Purchased from: Østensjø Rederi, AS, Norway
Builder: Myklebust Verft AS
Commercial Class: Remotely Operated Vehicle (ROV) and survey vessel
Year Built: 2003
Propulsion System: 4 x diesel electric generators powering 2 x azimuth propulsion systems and 3 x bow thrusters
Positioning System: Kongsberg K-POS Dynamic Positioning 2 (DP2) System
Dive Systems: IHC Hytech 3 person wet bell and Surface Supply Breathing Apparatus through an enclosed moon pool. Recompression chamber
Hydrographic Systems: Kongsberg EM712 Multi Beam Echo Sounder and EA 440 Single Beam Echo Sounder
Remotely Operated Vehicle: AAB Seaeye Cougar Remotely Operated Vehicle
Length: 84.7 m
Beam: 18.0 m
Draught: 6.8 m
Displacement (Full): 5741 tonnes
Range: 7000 nautical miles
Speed: 13 knots
Core Crew: 39
Bunks: 66

Delivery: May 2019 (and is expected to be in service in November 2019)
Home port: Gisborne
Ship Sponsor: Yet to be announced

Download PDF Factsheet (pdf, 192kb)
Download Dive Hydro Poster (pdf, 9,206kb)

Badge - Ship's Crest

Yet to be announced.


On 22 August Minister of Defence Ron Mark announced the purchase of the 85-metre Edda Fonn, a 15-year-old survey and light construction vessel from Norwegian firm Østensjø Rederi AS, as the replacement for decommissioned dive tender HMNZS MANAWANUI and hydrographic survey ship HMNZS RESOLUTION.

Following purchase, the Edda Fonn will be outfitted with the dive and hydrographic systems required by the Defence Force, before being delivered to Devonport Naval Base in May 2019. 

22 August 2018: Ministerial announcement
27 August 2018: Homeport announcement
1 September 2018: 3-in-1 capability with new Hydrographic Dive Ship story.
1 October 2018: How the ship was selected story.
1 October 2018: Huge honour as commissioning Commanding Officer story.
9 February 2019: MV Edda Fonn arrives in Denmark to begin her modifications and conversion, the Navy's future Dive Hydro vessel.
19 February 2019: MV Edda Fonn, surrenders her civilian colours for the tones of a warship. She is currently in Denmark, being fitted with new equipment suitable for her Navy role. 
28 February 2019: Getting ready. In these latest drone images of our future Dive Hydro Vessel, beside sister ship Edda Frende, we can see the new superstructure is now complete. Sea trials are set for next month. Despite the paint job the ship has a freshly painted ‘Edda Fonn’ on its side, as the ship will stay under that name until delivered to New Zealand in May. 
15 March 2019. Back to sea in grey! New ship MANAMANUI leaves her Danish port to conduct sea trials ahead of her delivery voyage to New Zealand.
23 March 2019. MV Edda Fonn (MANAWANUI) leaves her Danish port of Frederikshavn on her delivery voyage to New Zealand via Panama Canal, a distance of 11,570 nautical miles.
13 April 2019. MV Edda Fonn has arrived in the Caribbean Sea and will shortly join the queue to start her transit through the Panama Canal.
18 April 2019. MV Edda Fonn has passed through the Panama Canal and entered Panama Bay.  
6 May 2019. Ship Sponsor announcement.

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