By Capt. Neeraj Bharti, Founder, Master Mariner · Published · 2 min read
Clean hull on arrival: Australia, New Zealand and Brazil biofouling rules
A growing number of countries now treat a ship's hull as a biosecurity issue. Marine organisms carried on hulls can establish themselves in new waters and cause lasting environmental and economic damage. Australia, New Zealand and Brazil are among the countries that expect arriving ships to show they manage biofouling, and getting it wrong can mean inspections, cleaning orders or delays.
This article gives an overview. Rules change and details matter, so always check the current requirements with the authority, your agent and your P&I club before the voyage.
New Zealand
New Zealand's Craft Risk Management Standard for biofouling requires vessels arriving in its waters to have a "clean hull", within thresholds that depend on how long the vessel stays and where it goes. Vessels must be able to show how they meet the standard, for example through cleaning shortly before arrival, a biofouling management plan and records, or another approved approach. The Ministry for Primary Industries publishes the current requirements.
Australia
Australia requires international vessels to manage biofouling and to report on it before arrival. Operators are expected to show that biofouling is being managed, typically through a biofouling management plan and record book, recent cleaning, or another approved method. Vessels that cannot show this may face further assessment.
Brazil
Brazil's maritime authority has introduced biofouling rules (NORMAM-401) for vessels in Brazilian waters, and P&I clubs have reported that they are enforced with penalties. Requirements include biofouling management documentation and controls on in-water cleaning in Brazilian waters.
What all three have in common
- A biofouling management plan and record book are expected as the basic evidence.
- Recent, documented cleaning before arrival is one of the clearest ways to show compliance.
- Niche areas (sea chests, gratings, thruster tunnels, rudder recesses) are treated as high-risk.
- In-water cleaning on arrival may be restricted or require capture, so it cannot be relied on as a fallback.
Why clean before departure
For ships trading from the Gulf, the Indian Ocean or West Africa to these countries, the practical answer is often to inspect and clean at or near the last port, where in-water cleaning is permitted, and keep a dated report as evidence. A ship that has waited at anchor in warm water is the highest risk of all. See leaving Gulf of Oman anchorages and returning to service after months at anchor.
What the cleaning record should show
- Date, location and contractor
- Areas cleaned, including niche areas
- Method, and capture where used
- Fouling before and after, with photographs or video
- Coating condition
Keep it with the biofouling record book.
Planning with Cleanship
We clean hulls, niche areas and propellers from bases in the UAE and India and provide dated reports for biofouling records. Tell us your vessel, current position and destination and we will advise on timing. Background: the complete guide to ship hull cleaning.
Sources & further reading
Frequently asked questions
Does New Zealand require a clean hull on arrival?
Yes. New Zealand's Craft Risk Management Standard for biofouling requires arriving vessels to meet clean hull thresholds that depend on length of stay and itinerary, and to show how they meet them.
What are Brazil's biofouling rules?
Brazil's maritime authority has introduced biofouling rules (NORMAM-401) covering management documentation and controls on in-water cleaning, which P&I clubs report are enforced with penalties. Check current details before calling Brazil.
What evidence should a ship carry for biofouling inspections?
A biofouling management plan, a biofouling record book, and dated reports of inspection and cleaning showing areas cleaned, method and condition before and after.
Can a ship be cleaned on arrival instead?
Not reliably. In-water cleaning on arrival may be restricted or require capture, so cleaning before departure from a port where it is permitted is often the safer option.
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