Local notices to mariners Ngā pānui ā-rohe ki te hunga mahi i te moana

Be advised 27 and 28 November 2025 there is a NZ Police training activity in the Hauraki Gulf

All mariners are advised that NZ Police will be carrying out training activities 3.5 nautical miles northeast of Ahaaha Rocks and 'The Noises' on both Thursday 27 and Friday 28 November 2025. The operations will be between 0800 hours and 1600 hours (8am and 4pm) on both days.

Police vessels will be in the area.

All mariners are advised to stay well clear of the area during the periods of activation.

Affected waterways are indicated within the bounds of the following coordinates:

• Point One: 36° 34.766S, 175° 04.036E
• Point Two: 36° 34.766S, 175° 09.515E
• Point Three: 36° 39.164S, 175° 09.536E
• Point Four: 36° 39.164S, 175° 04.118.

Do not use this map for navigation.

All mariners are advised that there will be live firing activities off South Kaipara Head from 25 to 26 November 2025. The operations will be between 0800 hours and 1700 hours (8am and 5pm), weather permitted. The area will be marked by flags on the beach and road access, which will be patrolled.

All mariners are advised to stay well clear of the area during the periods of activation.

Affected waterways

Do not use this map to navigate.

All mariners are advised that there will be marine works at Bayswater Marina for outer breakwater from November 2025 to February 2026.

The works involve:

• crane and barge operation
• piling
• removal and installation of pontoon and diving operations.

All mariners are advised to navigate with caution while operating in this area.

For further details, contact Bayswater Marina. You can:

• phone 09 446 1600
• email office@bayswater.co.nz.

You should not use this map to navigate.

All mariners are advised that there will be marine works at the north of Bledisloe Wharf, Ports of Auckland from November 2025 to March 2027.

The area will be demarcated with yellow markers. The works involve crane and lifting, piling, dredging, demolition and diving operations.

All mariners are advised to navigate with caution while operating in this area.

You should not use this map for navigation.

All mariners are advised that there are Controlled Area Notice from Ministry of Primary Industries around Great Barrier Island, Little Barrier Island and Waiheke Island.

There are two levels of controls in place. In ‘Red Zone’ areas anchoring is not allowed, and in ‘Yellow Zone’ areas anchoring is allowed but anchoring equipment used in the zone must be checked and cleaned before leaving the area.

For further information, contact MPI and find out about the legal rules for boating and fishing to stop the spread of exotic caulerpa.

Jason Son
Maritime Officer
Harbourmaster’s Office 

All mariners are advised that there will be marine construction at Halfmoon Bay Ferry Terminal from May to December 2025. The works involve barge, crane, piling and diving operations. All mariners are advised to keep minimum wake towards the site and navigate with caution while operating in this area.

*Not to be used for navigation

Jason Son
Maritime Officer
Harbourmaster’s Office

All mariners are advised that there will be marine constructions near Clarks Beach, Waiuku from mid-May 2025 to January 2026. The works involve dredging, piling and diver operations. All mariners are advised to keep minimum wakes and additional caution while operating in the area.

*Not to be used for navigation

Jason Son
Maritime Officer
Harbourmaster’s Office

All mariners are advised that there will be temporary river closures as a part of O Mahurangi – PENLINK project at Weiti River. Details of schedule and locations are in the map.

All mariners operating in this area, refer to this message from the project team.

Wēiti River channel temporary closures

Dear neighbours,

The work we needed to do during the planned river channel closure is complete. The river channel reopened this morning (Wednesday 9 July).

Short-term closures

To construct Pier 4 (eastern side) pylons, concrete will be pumped across the navigable channel every 7 to 8 working days. These typically take 5 hours to complete. When possible, they will be timed around low tide times. These short-term closures won’t be notified.

Should a vessel need to pass through the navigable channel, it is imperative to call on marine channel VHF 73 to alert the team of your intentions, so staff can move the concrete boom or delay a lift as necessary. It is unsafe for vessels to pass through the navigable channel until it is clear.

Work hours

Our work hours are typically:

• Monday to Friday, 7am to 6pm
• Saturday, 8am to 4pm.

However approval has been granted to extend the bridge work hours to 9pm and to Sundays, should it be needed.

We apologise for any inconvenience caused during the short-term closures. We thank all river users for their patience and understanding during the ongoing construction of the future Wēiti River Bridge.

Should you have any questions regarding these works please contact me.

Ngā mihi nui.

Trish Viall  
Stakeholder and Community Engagement Manager  
Mobile: 027 548 7474 Freephone: 0800 736 5465  
Email: trish.viall@fultonhogan.com

For information on the O Mahurangi project, visit www.nzta.govt.nz/penlink

Jason Son  
Maritime Officer 
Harbourmaster’s Office  

All mariners are advised that Drilling Barge operations are planned in the Westhaven and Northcote areas for several weeks. The barge will gradually reposition from South to North as its work progresses in the areas highlighted in green below. Work boat tenders will be servicing the barge. All mariners are advised to navigate with caution and to keep well clear of the barge. Wakes in the vicinity should be kept to a minimum.  

* Not to be used for navigation.
 
Jason Son  
Maritime Officer 
Harbourmaster’s Office  

Shoaling has been observered in the vicinity of the drying bank to the south of Karamuramu Island.

The shoaling appears to be particularly severe to the south and west of the South Cardinal beacon where depths are significantly less than those charted.

All mariners are advised to navigate with extreme caution while operating in this area.

*Not to be used for navigation

Andrew Hayton
Harbourmaster’s Office

All mariners are advised that there is shoaling on the western side of the channel,
near the Whau River Mouth. The location is identified with yellow, as below.
All mariners are advised to navigate with caution while operating in this area.

*Not to be used for navigation.

Christiaan Moss
Deputy Harbourmaster
Harbourmaster’s Office

All mariners are advised that there will be marine farm development at Western Firth from 9 November 2023. The development includes the installation of navigation aids, mussel lines, and others. The site is located in YELLOW on the map below. All mariners are advised to navigate with caution while operating in this area.

*Not to be used for navigation

Jason Son
Maritime Officer
Harbourmaster’s Office

All mariners are advised that construction of the O Mahurangi Penlink River Bridge will commence mid-September 2023 with the installation of temporary platforms built on the western and eastern banks of the Weiti River to facilitate the construction of the permanent Weiti River bridge. Work will involve pile drilling, vibing and hammering into the seabed.

A barge will operate between the two staging platforms providing materials to the work sites through to December 2026.

Passage through the Weiti River Bridge Construction Zone will remain open to mariners, however Weiti River closures are expected during the finally stages of the project build. All river closures will be notified prior to the planned works. Mariners are requested to keep wake to a minimum when transiting through the bridge construction zone for the safety of construction staff.

*Not to be used for navigation.

Bruce Goff
Maritime Officer
Harbourmaster’s Office

All mariners are advised that a sandbank, which is North of the No.15 marker in Tamaki River, is shoaling due to sand-building. Locations are identified as per below and the depth in the vicinity could be lower than charted depth.

All mariners are to navigate with additional caution while operating in this area.

*Not to be used for navigation.

Jason Son
Maritime Officer
Harbourmaster’s Office

The Harbourmaster has received reports of a submerged pile in the approaches to Tramcar Bay boat yard in the waters between Whangateau Harbour and Tramcar Bay.

All mariners are advised to navigate with extreme caution when operating in this area.

Not to be used for navigation.

Pulasthi Ranasinghe
Maritime Officer

All mariners are advised that the Department of Conservation has closed the Motuihe wharf due to public safety, the wharf will remain closed until further notice.

The Department is working closely with engineers to look at options available to remedy issues and re-open the wharf as soon as practicable.

The Department apologises for any inconvenience and will continue to keep the public informed as they seek solutions.

Updates will be provided on the DOC website and should you require further information, please contact the DOC hotline on 0800 362 468.

Map not to be used for navigation.

Pulasthi Ranasinghe
Maritime Officer

All mariners are advised to navigate with caution in the vicinity of the Hobson Bay/Okahu Bay derelict wave screen. Mariners are reminded that they should only navigate through the recognised entry/exit (as per chart NZ 5322).

Map not to be used for navigation.

Christiaan Moss
Deputy Harbourmaster

All Mariners are advised that a large tree has fallen into the upper reaches of the Wairoa River, potentially impeding navigation.

GPS coordinates:

• Latitude 36°58’840
• Longitude 175°02’655 

All mariners are advised to navigate with extreme caution in this area.

The map is not to be used for navigation.

Bruce Goff
Maritime Officer

All mariners are reminded that electronic chart plotters are to be used as an aid to navigation and paper charts should be updated and consulted.

Electronic raster charts used on some plotters may not incorporate the latest chart corrections.

Mariners are reminded to use up to date charts for navigation and advised to contact their plotter supplier if in doubt.

Harbourmaster’s Office