RNZYS Guide for
Sustainable Boating

We are delighted to acknowledge ecostore, a long-standing Squadron sponsor and partner, as the sponsor of this guide.

Protecting Our Playground: The RNZYS Guide for Sustainable Boating

Whether we sail, cruise under power or fish, we all share a common passion for our unique playground – the stunning Hauraki Gulf. As members of the Royal New Zealand Yacht Squadron, we have a unique opportunity to lead by example and help preserve this extraordinary marine environment for us, for our families and for future generations.

The RNZYS Guide for Sustainable Boating is your go-to guide for practical steps you can take to reduce your impact on the Gulf – on the water, at the marina, and beyond. It’s designed for all Squadron members, whether you’re racing offshore, enjoying a weekend cruise, or dropping a line for snapper.

The toolkit is structured into eight practical sections providing actionable tips, useful resources, and links to further reading to help you make more sustainable choices – no matter how you enjoy the water. These are:

1. Hull maintenance – everything you need to know on your obligations and options to maintain the hull of your vessel.

2. Eco-friendly boating practices – guidelines on sustainable boat maintenance and fuel use.

3. Energy efficiency –guidance on reducing fuel consumption and using renewable energy sources, such as solar power and energy-efficient engines.

4. Water and wildlife conservation – tips on minimising disturbances to marine life and reducing water pollution.

5. Waste management – best practices for reducing, reusing, and recycling waste while boating.

6. Regulatory compliance and biosecurity– information on local and national environmental regulations related to boating.

7. Educational resources – links to guides, and community-building initiatives aimed at spreading sustainable boating knowledge.

8. Get involved– tips on how you can support organisations dedicated to sustainability and get involved yourself to do your bit for our marine environment

9. Sustainability directory –useful contact details all in one place.

This is just the beginning. The RNZYS Guide for Sustainable Boating will continue to evolve, with new tips, updates, and insights shared over time.

We want to hear from you!

Your feedback is invaluable as we refine this resource to better serve our members and the Gulf we all love. Please send your feedback.

Together, let’s keep our waters clean, thriving, and ready for future generations.

1. Hull Maintenance

A clean hull isn’t just about performance – it’s one of the most important things you can do to reduce emissions, improve fuel efficiency, and prevent the spread of marine pests. Auckland boat owners have to specific hull cleaning requirements for bio-security purposes.

A fouled hull also increases drag, meaning your boat burns more fuel and releases more emissions. Regular cleaning can improve fuel efficiency by up to 30% and reduce wear on your engine. See Section 2.1: Fuel Efficiency for more on how hull condition affects performance.

A clean hull is essential for preventing marine pests from hitching a ride to new locations.

Rules are clearly explained in the Auckland Council Clean Boating Guide, and are summarised below.

In Auckland, the level of fouling (LOF) on your hull and in any niches (such as inlets, outlets, rudders, or propellers) must not exceed light fouling. Light fouling is defined as a thin slime layer with only scattered barnacles. Overall coverage must be no more than 5%.

If pests are present, your boat must not be moved to a new location until the pests are safely removed, as this could transfer them to another area.

How to comply:

  • Keep antifouling coatings up to date.
  • Clean the hull and niches regularly.
  • Choose antifouling suited to your boat, its use, and location – See section 1.2

If an Auckland Council inspection finds your boat hosting marine pests or exceeding fouling guidelines, they will work with you to develop a plan to safely remove pests and clean the hull. Your boat should not be moved to a new location until cleaning and pest removal are complete.

Antifouling is a protective coating system that prevents marine organisms from attaching to a boat hull. Using antifouling responsibly is a balancing act: effective coatings reduce the spread of invasive species, improve speed, and lower fuel consumption and emissions. At the same time, traditional antifouling paints release biocides into the water, which can harm marine ecosystems. Here is some information to help you weigh environmental impact, performance, and cost.

  • Hard (contact leaching) paints: Typically used for racing boats or speeds over 20 knots. The coating gradually wears away from water friction, exposing fresh biocide.
  • Soft or ablative paints: Used for slower vessels (under 10 knots). The coating dissolves over time, taking attached growth with it.
  • Self-Polishing Copolymer (SPC) paints: Similar to soft antifouls, these react with saltwater to control biocide release even when a boat is stationary.
  • Regulations note: In New Zealand, the EPA introduced new rules in 2023 restricting the types and volumes of biocides allowed in antifouling products. This has narrowed the range of traditional options available.

Hempel Silic One and Hempaguard X7 are biocide-free solutions based on silicone.

Hempaguard X7: Uses advanced hydrogel silicone and a fouling-preventing biocide to reduce slime adhesion. It offers long idle periods (up to 120 days) and high-level fuel efficiency. It provides up to 90 months protection on a large range of vessel types. Coming in big pack sizes, it is typically sprayed.

Silic One is based on Hempaguard X7, but does not last as long. It comes in smaller pack sizes and can be rolled. Both products can be touched up with Silic One.

These products are environmentally friendly because
a) nothing leaches into the environment; and
b), they increase speed and fuel efficiency (up to 3 knots for power boats travelling at more than 20 knots), which means vessels are burning less fuel and less exhaust is being pumped into the environment.

On a vessel which does not get used much, a small amount of slime may accumulate, but it can be removed with a soft micro fibre cloth, avoiding the need for water blasting.

These products are distributed by WPC Paints – wpcpaints.co.nz

For more information, contact

Duncan Crawford, Business Development Manager – Marine & Protective M 021 634 175 E [email protected]

Coppercoat

Coppercoat is a hard, two-part epoxy coating containing fine copper powder. Unlike traditional antifouling paints, it does not erode to release biocides. Instead, the copper is exposed on the outer layer but remains locked in the epoxy, releasing only minimal amounts into the water. This makes it long-lasting and reduces environmental impact.

A study by the Plymouth Marine Laboratory in the UK has shown that most antifouling paints are depleted after five years, whereas Coppercoat lost only around 4% of its thickness over the same period. It is classified as a non-eroding, non-hazardous coating.

Application requires careful surface preparation and a smooth finish (around 600-grade sanding or burnishing) to optimise performance. Over time, light slime may accumulate depending on usage and mooring location, but this can usually be removed with a soft cloth. Hard growth, such as barnacles, is less likely to attach and, if present, can be removed easily without damaging the hull or leaving marks. Periodic lift-outs for light burnishing, typically at two- to three-year intervals, help maintain long-term effectiveness.

Coppercoat is water-based, solvent-free, and widely applicable to sailing yachts, multihulls, aluminium and steel boats. While initial costs are higher than traditional antifouling, the extended lifespan reduces the need for annual re-coating and haul-outs, making it more economical over time.

Application is specialised and carried out by accredited professional applicators. Owners complete a project questionnaire through the Coppercoat website to obtain guidance and a quotation. Coppercoat is distributed by Hullwell.
For more information contact
Richard Cleave, Managing Director
+64 21 300 025 [email protected]

Finsulate is a protective film that is wrapped around the hull to insulate it. Tiny spines on its surface prevent the attachment of unwanted organisms, whether the boat is moving or not. It lasts about 8 years. Finsulate is imported and installed by Parker Marine Group in Whangarei.

Propspeed is widely used to protect propellers, shafts and rudder

The following biocide-free products are not currently available in New Zealand. Keep an eye out for updates it as the situation evolves.

  • International B-Free Explore: a silicone polymer preventing organisms from bonding with the hull.
  • Altex Repel: Currently under testing in New Zealand.

Removing old antifouling safely is important for hull preservation and environmental protection.

Traditional scraping or sanding can damage the gelcoat or epoxy barrier and release toxic debris.

Defoul is a solvent-free, biodegradable alternative. It is compatible with any subsequent coating, including traditional paints, biocide-free coatings, or Coppercoat. It must be used by professionals.

Applied like a gel and left to dwell for 8–12 hours, it penetrates old antifouling layers. The coating is then removed with a hot-pressure wash. Capture cloths are laid beneath the boat to contain waste, which is then rolled up and disposed of properly. This system prevents residues from entering the water and protects the environment.

Defoul is distributed by Hullwell.

 

Type How It Works Best For in Auckland Pros Cons Environmental Friendliness
Ablative (Self-Eroding) Paint gradually wears away with movement, exposing fresh biocide Regularly used pleasure boats, weekend cruisers – Fresh protection with use
– Less build-up than hard paints		 – Needs regular use
– Re-coating every 1–3 years		 Moderate
Hard (Scrubbable) Durable, hard coating where biocide leaches but paint film remains High-speed powerboats, race yachts, boats that are scrubbed often – Very durable
– Can be scrubbed
– Smooth finish		 – Builds up over seasons
– Biocide depletes over time → sanding required		 Lower
Polishing (SPC) Chemically dissolves at controlled rate, releasing biocide (e.g., Micron Extra, Altex No. 5) Boats in marinas or long-stay moorings – Consistent long-term protection
– No build-up
– Longer-lasting than ablative		 – More costly
– Less effective if boat is idle		 Moderate
Silicon-based Solutions (Hempaguard / Silic One) Uses Hydrogel silicone + fouling-preventing biocide that reduces slime adhesion High-speed powerboats, racing yachts, idle boats – Long-term protection
– Easy maintenance with soft cloth		 – More costly upfront Higher
Non-Eroding Epoxy (Coppercoat) Epoxy with copper powder; no erosion, lasts 10+ years Boats moored long-term, owners wanting reduced haul-outs – 10+ years of life
– Durable
– Less frequent recoating		 – Expensive upfront
– Requires professional application		 Higher
Finsulate Velvety fibre film wrap prevents organisms attaching (no biocides released) Eco-conscious boat owners, marinas with strict rules, long-term protection (5–10 years) – Non-toxic
– Lasts 5–10 years
– Easy to clean
– Installed once, minimal upkeep		 – Higher upfront cost
– Requires professional application		 Higher

  • The material the hull is made from determines which antifoul can be used. For example, aluminium boats can only use antifoul without copper oxide in the formula.
  • Correct application is key, so make sure you do your research and follow the manufacturer’s instructions.
  • Always clean boats over proper containment, particularly when removing antifouling.

For a good overview of antifouling products, techniques and tips, browse this article of Pacific Powerboat.

See this article about antifouling in Issue 7 of Yachting & Boating Quarterly.

If you want to delve into the detail, read the Australia and New Zealand Anti-fouling and Cleaning Guidelines.

There are two main ways to keep your hull clean: Lift and wash and in-water cleaning.

Lift & Wash

  • Lift and Wash is the most effective and environmentally responsible way to clean your hull is using a travel lift or haul-out facility. This method contains fouling waste and allows it to be disposed of properly — especially important for boats with old antifouling paint or signs of marine pests.
  • If your boat has been in the water for more than a few weeks without cleaning, it must be hauled out and checked for pests.

The main haul out facilities in the Auckland region are:

  • Orams Marine (Wynyard Quarter, Central Auckland)
    • Travel lifts up to 820 tonnes
    • Slipway and multiple lift options
    • Caters to superyachts, commercial vessels, and large yachts
  • Half Moon Bay Marina (Pakuranga, East Auckland)
    • Two travel lifts up to 85 tonnes
    • Covered work bays, modern hardstand
    • Ideal for leisure yachts and cruisers
  • Hobsonville Marina (Upper Waitematā Harbour)
    • Travel lifts: 35 and 75 tonnes
    • 12,000 m² hardstand, full maintenance services
    • Suited for medium-sized yachts and launches
  • Pine Harbour Marina (Beachlands, East Auckland)
    • Travel lift up to 50 tonnes
    • Haul-out, wash, cradle placement, storage
    • For keelboats, launches, and cruising yachts
  • Westhaven Floating Dock (Westhaven Marina)
    • Floating dock lift system
    • Mainly for short haul-outs, race boats, and wash-downs
  • Fusion Marine (Silverdale, North Auckland)
    • Travel lift up to 50 ft / 15 m vessels (≈1.8 m draft)
    • Local haul-out and maintenance yard
    • Best for smaller yachts and launches
  • Norsand Boatyard (Whangārei, just north of Auckland)
    • Slipway and hardstand facilities
    • Specialists in monohulls and multihulls
    • Widely used for refits and long-term storage

For other regions around New Zealand, Yachting NZ has information on all NZ haul out facilities here.

In water cleaning

  • In-water diver cleaning is only recommended if:
    • your vessel is cleaned regularly (e.g., monthly)
    • the hull has no visible pests
    • allowed under local regulations.
  • If done without caution, diver cleaning can dislodge pests and spread them to new regions. Check with your marina or Auckland Council biosecurity rules before arranging in-water hull cleaning.
  • For more on marine pest rules, see Section 5.2: Marine Pests
  • For practical tips on cleaning gear and reporting pests, see Section 3.4: Stop the Spread of Marine Pests

Below are some local operators to get you started

Deep Dive Division
  • Works on yachts, launches, and small commercial craft.
  • Services: hull cleaning, prop scrubs, anode replacement, inspections.
  • Often hired by yacht owners in Westhaven, Orākei, and Half Moon Bay
  • Tua Karalus: 021 115 6809 | Courtney Karalus: 021 040 4171
  • deepdivedivision.co.nz
Commercial Dive Specialists (CDS)
  • Offers pre-race hull cleaning, prop polishing, and anode servicing for keelboats and cruising yachts.
  • Regularly services Westhaven and Gulf Harbour
  • +64 21 731 775
  • commercialdivespecialists.co.nz
Harbour Dive Services (smaller local outfit)
  • Specialises in yacht and launch hull cleaning at Auckland marinas.
  • Services: hull scrubbing, prop cleaning, anode replacement, quick inspections.
  • Covers Okahu Bay, Half Moon Bay, Pine Harbour, Orākei, and Westhaven.
  • (mobile contacts usually provided directly through marina offices)
  • harbourdive.co.nz
Ovlov Marine – Dive Division
  • Focused on private boats in Westhaven Marina.
  • Services: hull cleans, propeller polishing, anode checks/replacements.
  • 09 377 4288
  • ovlovmarine.co.nz

2. Lower Impact Boating Practices

Looking after our environment starts with small, everyday choices – including how we care for our boats. These simple, lower impact practices can help reduce pollution, protect marine life, and keep the places we love cleaner and healthier for everyone.

Use cleaning products independently certified as safer for the environment.

Choose marine-safe soaps and degreasers to prevent chemical run-off into the ocean.

Ecostore is a proud partner of RNZYS and the sponsor of the RNZYS Guide for Sustainable Boating. They offer a complete range of products well suited for use on board, with independently-certified formulations that are safer for the environment. From dishwashing liquid and toilet cleaner to an all-purpose boat wash, their products are designed to keep your boat clean without harming the marine environment.

RNZYS members receive 15% off all products online at www.ecostore.com (log in to your profile on the RNZYS member portal to get the discount code).

Scrub, don’t spray
Minimise freshwater usage by cleaning surfaces with brushes and rags instead of high-pressure hoses.

Repurpose old household items
If you’ve got old rugs or towels at home, bring them aboard! They’re perfect for cleaning tasks and give your old textiles a second life.

Regular maintenance = fewer emissions
Keep your engine, propeller, and hull clean and well-serviced to reduce fuel use and avoid breakdowns that could lead to spills.

Preventative measures

  • Refuel with care: Use fuel collars or absorbent pads, and never overfill.
  • Carry spill kits onboard with absorbent socks and pads. Ship chandlers such as Burnsco sell them.
  • Switch to cleaner fuel alternatives such as biofuels or electric motors.
  • Prevent engine run-offs: Use absorbent pads under your engine to capture oil or fuel leaks.

If you cause a spill

If you cause a spill in the marina where you are berthed, call their office immediately for help. You can find their numbers in section Error! Reference source not found..

If you cause a spill while out on the water, following these steps will minimize the environmental impact and ensure you’re complying with maritime safety regulations:

  1. Stop the Source: Immediately stop the source of the spill if possible. This may involve shutting down the engine or closing off any fuel valves to prevent further leakage.
  2. Contain the Spill: Use absorbent pads, booms, or other spill containment equipment to limit the spread of the spill. If you don’t have proper equipment, try to use anything you have onboard to create a barrier and contain the spill.
  3. Alert Authorities: Contact the relevant authorities immediately:
  • New Zealand: Call the local Harbourmaster or the Pollution Hotline. For marine spills, you should contact the Harbourmaster Duty Officer (09 362 0397).
  • Auckland Region: Auckland Council’s Pollution Hotline (09 377 3107).
  1. Notify Other Boaters: If you are in a busy area, notify other boats in the vicinity to avoid further accidents and to help with containment.
  2. Record the Spill: Document the spill as thoroughly as possible, noting the location, time, weather conditions, and any actions taken to mitigate the spill. This will be important for reporting purposes and any follow-up action. See how to report spills below.
  3. Clean Up: Once you have notified the authorities and taken necessary precautions, follow their instructions for clean-up. If spill containment is within your capacity, continue to manage the spill until the response team arrives.
  4. Prevent Future Spills: After handling the spill, review your onboard safety and spill response equipment. Consider investing in proper spill kits, absorbent materials, and training for your crew to handle similar situations in the future.

Reporting spills 

  • As good stewards of the environment, it is important to always report any oil, chemical, hazardous waste and sewage discharges to the proper authorities as well as any sick, injured, stranded, abandoned, harassed or disturbed wildlife. Reporting will help not only to protect our natural resources but also to minimise any potential impacts a spill or incident may cause.
  • To report pollution in Auckland Harbour, the primary contact is the Auckland Council’s Pollution Hotline on 09 377 3107. This hotline is available 24/7. If the pollution involves a vessel sinking, grounding, collision, or a marine oil spill, the Harbourmaster Duty Officer should be contacted at 09 362 0397 (extension 0).
  •  

Waste Oil and Filters

Some marinas around Auckland have designated waste oil drums and oil filter bins for the proper disposal of used oil. Remember, used oil filters should be placed directly in the oil filter bin, not in plastic bags.

  • In Westhaven Marina, you can find waste oil and filter disposal at the top of piers:
    • B, D, H, L, M, P, S, T, and Z.
  • In Gulf Harbour Marina:
    There are oil disposal bins located in the car parks.
  • In Bayswater Marina:
    Waste oil and filters are accepted at the main disposal area near the fuel dock.
  • In Hobsonville Marina:
    Disposal bins are available at designated service areas.
  • In Half Moon Bay Marina:
    Look for disposal points near the marina office and fuel station.
  • In Waiheke Marina:
    Waste disposal stations are located near the main pontoon and at the marina service centre.

For other marinas, please check with the marina management for their specific waste oil and filter disposal locations. Their contact details are here (link to section 8)

Dirty petrol, solvent, paint etc

Hazardous waste can be taken to Waitākere Refuse and Recycling Transfer Station | 50 The Concourse | Henderson | Auckland.

More information from Auckland Council about where to recycle different types of hazardous waste can be found on the Auckland Council hazardous waste website page here.

3. Energy Efficiency

Using energy wisely on your boat isn’t just good for the environment – it’s great for your wallet too. Whether it’s cutting back on fuel, running cleaner engines, or powering your gear with solar, small changes add up. Being energy efficient means you can go further, spend less, and enjoy your time on the water knowing you’re treading a little lighter. It’s all about boating smarter – not harder.

Optimise How You Drive and Reduce Weight

  • Cruise at your boat’s “sweet spot” (~75% of full throttle for planing hulls).
  • Avoid idling for extended periods.
  • Declutter your vessel–carry only what you need.
  • Manage fuel and water loads–don’t top up unless necessary.

Hull and Prop Efficiency

  • Clean your hull regularly to reduce drag. See more information in section Error! Reference source not found..
  • Use a high-efficiency propeller and ensure it’s free of damage.

A high-efficiency propeller (often called HE prop) is a specially-designed boat propeller that maximises thrust and fuel economy while minimising drag and cavitation. These are commonly used on sailboats, trawlers, and slow- to medium-speed vessels, where fuel efficiency and smooth operation matter more than outright speed.

Read more about it here: https://propellerpropeller.com/upgrade/benefits/

Engine Efficiency

  • Regular engine maintenance improves fuel economy.
  • Upgrade to a modern 4-stroke outboard if possible – they’re cleaner, quieter, and far more fuel-efficient than old 2-strokes. They burn fuel more completely, don’t mix oil with petrol, and use advanced technology like fuel injection to get more power from less fuel. The result? Lower emissions, smoother rides, and less impact on our marine environment.

Sail Assist (if applicable)

  • Add a mast, sail, or kite for downwind efficiency when possible.

Adding a mast, sail, or kite can significantly reduce fuel use on downwind passages, especially on long trips. Even a small sail can help stabilise the boat and reduce engine load. Many powerboats or catamarans use downwind sails like kites or parasails to improve efficiency on open-water legs. Some even retrofit small masts with headsails to take advantage of favourable winds. It’s a hybrid approach that saves fuel and adds versatility.

Harnessing renewable energy on board helps reduce reliance on the engine or shore power while keeping batteries topped up and appliances running. For small boats, yachts, and launches, solar power is the most practical and reliable option. Panels can be either portable/foldable (easy to stow when not in use) or fixed/flexible (permanently mounted to biminis, decks, or cabin tops).

Panel Technologies

  • Monocrystalline – Highest efficiency (15–22%), best for limited space.
  • Polycrystalline – Moderate efficiency (13–16%), cheaper but needs more area.
  • Thin-film/Flexible – Lowest efficiency but extremely light, flexible, and good for curved surfaces.

Foldable / Compact Solar Panels

What they are

Foldable panels are lightweight, suitcase-style or blanket-style solar arrays. They unfold at anchor or on shore, plug into a charge controller, and can top up house batteries, phones, navigation gear, lights, or even small fridges. When not in use, they fold away neatly and don’t interfere with sailing or deck space.

Why use them

  • Portable and space-efficient
  • Easy to deploy and stow
  • Great for weekend trips or casual cruisers
  • Affordable entry into solar

NZ Examples

  • HB21 200W Folding Panel
    Rugged monocrystalline folding kit with ETFE coating for durability, built-in legs for angling toward the sun, and MC4 connectors for marine controllers. Suitable for yachts/launches wanting medium-to-high output charging.
    Hb21 NZ
  • Jackery SolarSaga 100W
    Lightweight, compact folding panel with ~24% efficiency, ETFE laminate, and IP65 water resistance. Very portable with a carry handle. Suited to smaller boats or as a portable backup charger.
    Jackery NZ
  • Powerness 120W Foldable Panel
    A “solar blanket” style panel with four 30 W segments, LCD output display, and easy fold-down portability. A good mid-range option for launches or cruisers needing ~120 W daily input.
    Discount Tools NZ

Fixed & Flexible Solar Panels

These solar panels can be mounted on hard tops, rails, davits, curved deck, dodgers and bimini surfaces. They generate steady power without needing daily setup. Flexible types can bend or even be walked on, making them ideal for yachts with limited flat surfaces.

Why use them

  • Always charging when in sunlight
  • Low-profile and unobtrusive once installed
  • Higher daily energy harvest than foldables
  • Long-term durability

Panel types

Rigid Monocrystalline Panels (100–580 W)
Framed, fixed panels with high efficiency and long lifespan. Perfect if you have mounting space on arches, hard tops, or cabins. They are best suited for launches or larger yachts with spare deck or roof area.

Marine Solar Panels – LUX Solar

Juice Generation II & V Flexible Panels (55–210 W)
Lightweight, ultra-thin panels with >24% efficiency, designed for marine curved surfaces. They Can be glued or screwed onto cabins or biminis. They are great for yachts with limited flat mounting space.

Enertec Marine

GoFlex Zip-On Panels
Flexible panels that attach directly to canvas (like a bimini) using a zip system, removable when not needed. Ideal for sailing yachts with canvas biminis/tops. The zips can be installed by a marine upholsterer.

Beacon Marine NZ

SunWare Walk-On Panels
Textured, durable panels engineered for foot traffic, suitable for deck installations in high-use areas. Designed for powerboats and yachts where panels will be stepped on.

via Lusty & Blundell (NZ distributor)

Panel Installation & Usage Tips

  • Use MPPT controllers: More efficient than PWM, extracting up to 30% more usable power.
  • Keep panels clean: Salt and grime reduce output–rinse with fresh water regularly.
  • Mind shadows: Even a boom or rigging shadow can drop output significantly.
  • Sizing:
    • 100 W panel → ~25–30 Ah/day (12 V system, good weather)
    • 200 W panel → ~60 Ah/day
    • Enough for lighting, phones, nav gear, autopilot, and small refrigeration.

Electric propulsion is rapidly becoming a cleaner, quieter alternative to traditional petrol engines. The options below highlight engines that offer reliable performance while reducing emissions, noise, and ongoing maintenance.  They can be solar-charged from your house bank. However, they are currently still more expensive than traditional engines.

Outboards

  • Spirit 1.0 Plus (ePropulsion): A 1 kW electric outboard, roughly equivalent to a 3 HP petrol motor. It’s lightweight, portable, and perfect for tenders, dinghies, or very small yachts. The lithium battery simply clicks on top.
  • Mercury Avator™ Series: Mercury’s new line of electric outboards (3.5–20 HP equivalents). Designed to match their petrol outboards in style, but with zero emissions and silent running.
  • Navy Series (ePropulsion): Larger electric outboards (3–6 kW), suitable for launches, small keelboats, and larger tenders.

Inboards / Pod Drives

Below are some models that entirely replace diesel, reduce underwater noise, and allow “silent motoring.” They are ideal for harbour and coastal cruising.

  • NZ Electric Boat Co.: A local builder offering full electric inboard systems designed for NZ conditions. They focus on retrofits and new builds up to launch size.
  • Evocean H-100: A European-built high-torque electric motor, powerful enough for displacement launches and cruising yachts.
  • I-Series (ePropulsion): Integrated pod drives that mount directly under the hull, very efficient for sailing yachts.

Jet Systems

Jet systems eliminate fossil fuels for tender trips, reduce maintenance and avoid prop strikes on marine life.

  • ZeroJet 48V 18 kW: A New Zealand company making compact electric jet drives, usually fitted in RIB tenders or small runabouts. Jets are safer (no propeller) and efficient at short-range, high-manoeuvrability use.

Conversion Services

Conversions extend the life of an existing boat hull, reducing waste and avoiding the footprint of building new vessels.

  • Naut: A systems integrator that designs custom electric drive packages, tailored to either cruisers (longer range, quiet) or sport boats (higher power).
    Naut

Energy-Efficient Engines

Energy efficient engines reduce diesel consumption, provide flexible range, and are often a practical “stepping stone” to full electric engines.

  • Hydrogeneration (e.g., Oceanvolt): While sailing, the propeller can freewheel in reverse, using water flow to generate electricity and recharge your batteries. This can add dozens of amp-hours on a passage without running an engine.
  • Hybrid Systems (e.g., Hybrid Marine): Combine a small diesel with an electric motor. The boat can manoeuvre or cruise short distances on electric, but has diesel backup for range. The diesel can also recharge the batteries when needed.

Emerging Technologies

Some emerging technologies offer true zero-emission boating, although they are currently at an early stage of development, are high-cost and have limited availability in NZ.

  • Hydrogen Fuel Cells (e.g., Sanlorenzo Almax): Generate clean electricity from hydrogen gas, with only water vapour as exhaust. Currently seen in large yachts and pilot projects.
  • Solar Electric Boats (e.g., Blue Innovations R30): Entirely solar-powered, with large deck arrays charging batteries for both house systems and propulsion. Typically used for eco-tourism and inland/coastal waters.

4. Water and Wildlife Conservation

Spending time on the water is one of our members’ great joys – but with that privilege comes responsibility. Whether you’re racing, cruising, fishing or paddleboarding, there are some easy, effective ways to help protect our marine environment and the wildlife that depend on it.

We’ve put together some simple ways to protect our harbours and oceans while you’re out on the water.

If it doesn’t belong in the sea, it doesn’t go in the sea. The message is simple: nothing overboard, ever.

  • Even organic waste like apple cores and fruit peels can harm marine ecosystems.
  • Pack it in, pack it out. Everything you bring aboard should leave with you.

Food scraps and organic waste may seem harmless, but in reality they disrupt the balance of the ocean. Decomposing food reduces oxygen in the water, attracts pests or invasive species, and can alter the natural behaviour of marine life.

In New Zealand, it’s not just best practice – it’s the law. Under the Marine Protection Rules (Part 170), which enforce MARPOL Annex V, it is illegal to throw any garbage overboard, including food waste. Boats 12 metres or longer must also display a clear sign reminding everyone of the rules.

Suggested wording for your onboard sign:

Keep Our Seas Clean – It’s The Law
No garbage of any kind, including food scraps, may be thrown overboard in New Zealand waters.
Keep all rubbish on board and properly dispose of it on land.
(Marine Protection Rules Part 170 – MARPOL Annex V)

For more practical advice on reducing, reusing, and recycling onboard–and how to handle sewage and greywater safely–check Section 5 – Waste management.

Many everyday products wash off into the sea, harming marine life. Here’s how to do better:

  • Sunscreen: Use reef-safe sunblock that’s free from harmful chemicals like oxybenzone and octinoxate.

Learn more about reef-safe sunscreen.

Melittaskin is a New Zealand company that makes reef-safe sun block with guaranteed UV protection. You can buy it here.

  • Soaps, shampoos & detergents: Choose cleaning and personal care products that have been independently certified as safer for the environment.

RNZYS members receive 15% off all products online at www.ecostore.com (log in to your profile on the RNZYS member portal to get the discount code).

See here for Eco-Friendly Boat Cleaning Alternatives

  • Use cleaning products sparingly and minimise the amount discharged into the water. Cleaning products that have been independently certified as safer for the environment are far less harmful than bleaches, scouring powders or detergents, but they can still be toxic to marine life.
  • Never pour any cleaning products straight into the sea, or into sinks that run into the sea. Dispose of them on shore.
  • Refill bottles when possible to reduce plastic waste.

Grey water (from sinks and showers) and black water (from toilets) can harm marine ecosystems. Untreated sewage can contaminate the shellfish we eat, or make water unsafe for swimming for a long time after it is discharged.

General guidelines

  • Minimise discharge into the sea – use toilets on land before you head out, fit a holding tank, and install a treatment system if you can.
  • Use holding tanks and pump-out stations where available.

Boat sewage discharge rules

The rules are set in Maritime NZ’s national regulations (Resource Management (Marine Pollution) Regulations 1998. They are well explained on the Auckland Council website.

  • Untreated sewage may only be discharged when:
    • The boat is underway, in open water,
    • The water depth is over 5 m,
    • At least 500 m from shore, marine farms, and customary fishing reserves (mataitai),
    • And at least 200 m from marine reserves.
  • Discharge is prohibited in places like:
    • Waitematā Harbour, Mahurangi Harbour
    • Bostaquet Bay in Kawau
    • Port Fitzroy, Nagle Cove, and Tryphena Harbour on Great Barrier Island.

Pump-out facilities

  • In Westhavenmarina, there are sewage pumps on the fuel dock as well as on some of the newer piers on the West side of the marina.
  • Waiheke Island Marinahave pump-out services for holding tanks at the end of J-Pier. There is a small fee.  Contact the office for help on 09 200 2870 or by VHF channel 73.

Useful information on wastewater discharge

Pets on boats can be fun–but also a risk to local wildlife, especially ground-nesting birds.

  • Know where pets are allowed
    Where and when you can walk your dog
  • Know where pets are not allowed, such as protected islands or bird sanctuaries.
    Pet-free conservation areas info
  • Keep pets well-fed and under control. Don’t let them chase or harass wildlife.
  • Always bring a pet waste bag ashore. Bag it and take it back to your boat for proper disposal.

…

Observing Marine Life

  • Observe wildlife from a distance. Avoid feeding, touching, or chasing dolphins, whales, or seabirds.

Tips for safe wildlife viewing

If you notice a marine mammal being harassed, severely injured or entangled, contact DOC immediately on 0800 DOC HOT (0800 362 468).

Fishing

If you’re fishing, stick to legal size and catch limits, and consider using barbless hooks or catch-and-release techniques.

Download the Ministry of Primary Industry’s Fishing Rules App. It provides great information about species and legal catch sizes and limits.

Barbless hooks

A barbless hook is just like a normal fishing hook but without the little backward-facing spike (the “barb”) on the point. On a standard (barbed) hook, the barb is designed to stop the fish slipping off once hooked. On a barbless hook, the point is smooth and straight – this makes it easier to remove from a fish, net, clothing, or even your own skin.

Barbless hooks are quite popular and widely recommended across New Zealand’s recreational fishing community. They’re recognized as safer for fish and people, especially when practicing catch-and-release. While not legally required, they’re a smart tool for anyone wanting more humane, conscientious, and effective angling.

Marinas and Mooring Buoys

Using a mooring buoy or marina berth instead of anchoring helps protect fragile marine habitats, like seagrass beds and coral, from being damaged by anchor chains and dropped anchors.

Mooringo is a convenient mobile app that allows boaters to book berths in New Zealand marinas.

Auckland transport website has a moorings and zone map which includes moorings for sale and rent.

The Squadron has three bookable moorings for its members in Bon Accord harbour, Kawau. To book a mooring click here.

For a list of private moorings for rent in Great barrier island look here: Moorings – Aotea Great Barrier Island

5. Waste Management

Spending time on the water is one of our members’ great joys – but with that privilege comes responsibility. Whether you’re racing, cruising, fishing or paddleboarding, there are some easy, effective ways to help protect our marine environment and the wildlife that depend on it.

We’ve put together some simple ways to protect our harbours and oceans while you’re out on the water.

There are easy ways to minimise waste production onboard:

  • Plan ahead by choosing products with minimal packaging, avoiding single-use plastics, and bringing only necessary items.
  • Use refillable containers for food and beverages instead of disposable ones.
  • Avoid excess packaging by purchasing bulk items and transferring them into reusable containers. Many products from our sponsor ecostore, such as cleaning supplies and toiletries, come in refillable bottles that you can top up at local refill stations to further reduce packaging waste.
  • Limit food waste through careful meal planning to avoid excess perishable items.

Reusing items onboard not only reduces waste but also promotes sustainability. Key strategies include:

  • Using durable and reusable dinnerware instead of disposable plates and cutlery.
  • Repurposing items such as turning empty bottles into storage containers or using old sails for repairs.
  • Repairing instead of replacing damaged equipment to extend its lifespan and reduce waste generation.

Recycling ensures that waste materials are processed for reuse rather than ending up in the ocean. Best practices include:

  • Using separate buckets/bins/bags on board to sort recycling and rubbish until you can dispose of it properly on land. A good tip is to use labels or clips of different colours.
  • Bringing waste back to shore and disposing of it at proper recycling facilities.
  • Using dockside recycling programs where available at marinas. For instance, Westhaven marina has can recycling bins that support the Kai Ika
  • Educating fellow boaties about recycling protocols to spread awareness and encourage responsible practices.
  • Using a container with a lid (a reused yoghurt or ice cream container is great for this) for organic waste. You can keep it in the fridge (if you have one) to stop smells and dispose with your organics when you get home.

Bonus Tip: Keep reusable items on board – such as water bottles and shopping bags to reduce single-use plastics.

Soft plastic bait bags can be recycled through soft-plastic recycling schemes – but only if they’re properly cleaned first.

Before recycling:

  • Rinse bait bags thoroughly with fresh water
  • Remove all residue and fish oils
  • Let them dry completely

If not cleaned properly, the strong smell can contaminate entire recycling streams, meaning the material may end up in landfill instead. A quick rinse on board or at home makes a big difference.

Where available, drop clean bait bags off at participating soft-plastic recycling collection points when you’re back on shore.

Quick Checklist Before you leave the dock

  • Reef-safe sunscreen onboard
  • Certified safer soaps/detergents stocked
  • Rubbish and recycling bins ready
  • Gear and anchor cleaned
  • Wastewater systems checked
  • Pet access rules reviewed
  • Plan for responsible wildlife viewing

6. Regulatory Compliance and Biosecurity

As members of the RNZYS community, we all share responsibility for protecting the Hauraki Gulf and beyond. Complying with local maritime and environmental regulations isn’t just a legal requirement – it’s an important part of keeping our waters clean, safe, and thriving for future generations.

Staying compliant is not hard – it just means staying informed and being proactive. Small actions like checking your hull or anchoring in the right spot make a big difference to marine life.

Together, let’s keep our waters beautiful, biodiverse, and boat-friendly!

Ministry for Primary Industries (MPI) – Biosecurity New Zealand

MPI is in charge of protecting Aotearoa’s oceans and coasts from harmful marine pests and diseases. Their work includes:

  • Managing unwanted organisms like Caulerpa and fanworm.
  • Providing guidance on cleaning and checking your vessel before moving to a new area.

Tip: Always “check, clean, and dry” your gear and hull–especially before visiting marine reserves or pest-affected zones.

Boating and water activities: preventing the spread of pests, weeds, and diseases | NZ Government

Auckland Council

Auckland Council regulates:

  • Stormwater discharge
  • Waste disposal and pump-out rules at marinas
  • Noise and light pollution
  • Anchorage restrictions to protect marine biodiversity

The Auckland Unitary Plan includes rules on discharges from boats and maintenance practices.

Auckland Council information:

Environment

Marine and freshwater environment

Harbourmaster (Auckland Transport)

The Harbour master ensures navigational safety and environmental compliance within the Waitematā Harbour and Hauraki Gulf. Responsibilities include:

  • Mooring and anchoring restrictions
  • Speed and wash zones
  • Fuel spill reporting procedures

Tip: Before heading out, check if your anchorage is in a marine pest exclusion or surveillance zone.

Auckland Harbourmaster Information

Unwanted species can easily attach to hulls, niche areas (e.g., intakes, rudders), or even inside bilges and seawater systems. Once introduced, they outcompete native marine life and are hard to remove.

Top marine pests in Auckland

Mediterranean fanworm

With an ability to pack in 1,000 individuals per square meter, Mediterranean fanworm makes it difficult for other species in the vicinity to survive. Hitchhikes on boats.

You can find an identification guide on the Biosecurity New Zealand website here.

Exotic Caulerpa

This fast-spreading invasive seaweed smothers native habitats and is currently a serious threat in several coastal areas in the Hauraki Gulf, including Aotea / Great Barrier Island.

It spreads rapidly, forming vast, dense beds or meadows. Harmful to fish nurseries.

It is illegal to:

  • Anchor, fish, or dive in Caulerpa exclusion zones
  • Move contaminated equipment or vessels without cleaning

Check the latest Caulerpa maps and rules

Asian Paddlecrab: Aggressive competitors with a vicious bite. Strong swimmers that travel attached to fouling on a boat’s hull, as larvae in ballast water where they can survive for up to a month.

Tips to reduce pest spread

  • Clean all your gear before and after your trip–especially shoes, fishing rods, paddles, dive gear, and anchor chains.
  • Check anchors for weed before leaving a spot. Bag any weed found and dispose of it with your rubbish.
  • If moving to a marine reserve or pest-free area, double-check your boat is clean before you go.
  • Pay special attention to sea chests, bow thrusters, intakes, and anodes.
  • Scrub your hull regularly to avoid spreading invasive species and even more if moving between bays or regions. (For more information on keeping your hull clean see section Error! Reference source not found.)

You can find more information here: Biofouling and pest control infomation

More information on marine pests can be found on the MPI website – Marine Pests.

A useful document is the New Zealand Marine Pest ID guide.

To report marine pests, call MPI on 0800 80 99 66 or use their online reporting tool.

Marine reserves are complete no-take areas that protect marine life for scientific study and your enjoyment. Help protect marine reserves by following these rules.

  • No fishing of any kind.
  • Don’t take or kill marine life.
  • Don’t remove or disturb any marine life or materials.
  • Don’t feed fish – it disturbs their natural behaviour.
  • Take care when anchoring to avoid damaging the sea floor.

Marine reserves around Auckland include:

Hauraki Gulf Marine Park

Goat Island

Long Bay-Okura Marine Reserve

Tawharanui Marine Reserve

Pollen Island Marine Reserve

Te Matuku Marine Reserve (Waiheke island)

You can find the general map here.

There are new marine protection areas around the Hauraki Gulf. See the map for an overview:

Find more information about the areas and the rules on the Department of Conservation’s website here.

Download the map of the Hauraki Gulf marine protection areas here

Your RNZYS Compliance Checklist

  • Check for any current marine pest restrictions before departure
  • Clean your hull regularly (minimum every 6 months)
  • Use designated pump-out stations for sewage and greywater
  • Report any suspected pest sightings to MPI
  • Know your anchorage rules, don’t anchor where you shouldn’t

7. Information & Educational Resources

As members of the RNZYS community, we all share responsibility for protecting the Hauraki Gulf and beyond. Complying with local maritime and environmental regulations isn’t just a legal requirement – it’s an important part of keeping our waters clean, safe, and thriving for future generations.

Staying compliant is not hard – it just means staying informed and being proactive. Small actions like checking your hull or anchoring in the right spot make a big difference to marine life.

Together, let’s keep our waters beautiful, biodiverse, and boat-friendly!

8. Get Involved

Looking after our oceans and coastlines is a shared responsibility – and one that’s deeply connected to the values of the Squadron. Whether it’s through hands-on work, knowledge-sharing, or financial support, every member can play a part. From restoring native bush on Kawau Island to backing national ocean advocacy, there are many ways to give back. Here we highlight some of the incredible initiatives you can support with your time, energy, or donations.

The RNYS owns a large property at Smelting House Bay on Kawau island, which includes Lidgard House and adjoining land.  Our vision is that kiwi and other native birdlife will return to our property.  To achieve this, the current invasive species and pests need to be removed, with native shrubs and trees to take their place.

Pine clearing commenced in 2021, and as of August 2025 more than 5000 native plants have been established. Now in our fourth year, we have been focusing on assisting those plants to survive and flourish.

  • What we do: Our volunteers go to Kawau as part of volunteer weekends and perform planting, maintenance, weed and pest management on the property, then relax and socialise together. There is a cruising rally and three-day working bee every year on King’s Birthday weekend which is great fun to be part of.
  • How to get involved: Join the volunteer weekends, they are advertised on the Squadron website.
  • Website: Kawau Island Tree Planting & Reforestation Project – Royal New Zealand Yacht Squadron

Live Ocean Foundation was created by Kiwi sailing legends Peter Burling and Blair Tuke. Its vision is a healthy ocean for a healthy future. Its mission is to scale up science, innovation and outreach for a healthy ocean.

  • What they do: Live Ocean partners with exceptional New Zealand scientists, innovators and communicators to scale up action for a healthy ocean. They believe that ocean science, data and innovation are needed to engage communities and inform policy.
  • How to get involved: use their resources to deepen your knowledge about ocean conservation, subscribe to their newsletter and make a donation.
  • Website: liveocean.org

Sustainable Coastlines is a Kiwi charity that mobilises volunteers for large‑scale coastal clean‑ups, litter monitoring, tree planting, and environmental education.

Sea Cleaners is a non‑profit dedicated to removing marine litter from harbours, beaches, and the ocean.

  • What they do: Since 2002, they’ve removed over 14 million L of debris, coordinating volunteers and delivering educational programs (tetiniatangaroa.org.nz, seacleaners.com).
  • How to get involved: Volunteer for clean‑up events, donate, or sponsor one of their vessels.
  • Website: seacleaners.com

This project is a waste‑reduction initiative focused on minimising food waste from fish processing.

  • What they do: they operate mobile filleting trailers in Auckland and Hawke’s Bay to recover fish parts typically discarded. This reduces landfill waste, educates on sustainable resource use, generates employment, and shares kai (food) with local communities
  • How to get involved: Support via volunteering at filleting events or donating to their kaupapa.
  • Website: kaiika.co.nz

Kelly Tarlton’s Marine Wildlife Trust is a regional not-for-profit organisation dedicated to help rehabilitate sea turtles that come into its care. It aims to protect the biodiversity of Hauraki Gulf/Tīkapa Moana Te Moananui ā Toi and to inspire, motivate and educate others to do the same.

It aims to carry on Kelly’s legacy of caring for, and creating love for the oceans, through a combination of hands-on initiatives, as well as education programs set to inspire the youth of today.

9. Sustainability directory – useful contact details all in one place

Auckland Central Marina

Bayswater Marina

Cracker Bay Marina

Gulf Harbour Marina

Half Moon Bay Marina

Hobsonville Marina (Upper Waitematā Harbour)

Pine Harbour Marina (Beachlands, East Auckland)

Viaduct Harbour Marina

Waiheke Marina

Westhaven Marina

Auckland Harbour Master

Coastguard

Police Maritime Unit

Spill reporting

  • Auckland Harbourmaster Duty Officer: +64 9 362 0397
  • Auckland Council’s Pollution Hotline: +64 9 377 3107.

Department of Conservation – distressed wildlife in reporting

  • Phone: 0800 DOC HOT (0800 362 468).

Biosecurity New Zealand – marine pest reporting

Fusion Marine (Silverdale, North Auckland)

Gulf Harbour Marina

Half Moon Bay Marina (Pakuranga, East Auckland)

Hobsonville Marina (Upper Waitematā Harbour)

Norsand Boatyard (Whangārei, north of Auckland)

Orams Marine (Wynyard Quarter, Central Auckland)

Pine Harbour Marina (Beachlands, East Auckland)

Westhaven Floating Dock (Westhaven Marina)