Blog · Hull Cleaning & Coatings
Biofouling Risks and Hull Cleaning: 2026 Guide for Australian Ports
The Escalating Global Biofouling Threat
As maritime trade patterns shift, ship operators face increasing biofouling pressures. Extended anchorages and route diversions create optimal conditions for marine growth, directly impacting a vessel's hydrodynamic performance and biosecurity profile. A recent example of this compounding risk is the mass lay-up of vessels in the Arabian Gulf. In late July 2026, researchers highlighted a severe biosecurity threat following these extended delays. A report published in The Maritime Executive detailed findings from environmental scientist Prof. Mario Tamburri, noting that the 1,500 merchant ships forced into lay-up during the Hormuz shutdown accumulated immense fouling. As these vessels resume regular trade, they carry a high risk of transferring invasive species to ports worldwide, including those in Australia.
For vessels calling at the Port of Brisbane and other Australian terminals, this global fouling pressure translates to strict local scrutiny. Arriving with excessive marine growth is not an option. Operators must rely on proactive hull management, effective antifouling coatings, and compliant in-water cleaning protocols to meet Australia's stringent entry standards.
Understanding DAFF Biofouling Requirements
Biofouling management is mandatory for all vessels arriving in Australian territorial seas from international locations. It is crucial to remember that this arrival scheme is administered by the Department of Agriculture, Fisheries and Forestry (DAFF) under the Biosecurity Act 2015, not by the Australian Maritime Safety Authority (AMSA). Operators report their biofouling data through the Maritime Arrivals Reporting System (MARS) prior to arrival.
To avoid delays or intervention, operators must demonstrate proactive management. According to DAFF's official guidance on Australian biofouling management requirements for commercial vessels, there are exactly three accepted practices a commercial vessel can rely on:
- Option 1: Operating under a Biofouling Management Plan and Record Book consistent with the Australian Biofouling Management Requirements for Commercial Vessels (ABFMR-CV). Version 4 of these requirements took effect on 30 April 2026.
- Option 2: Cleaning all biofouling from the hull and niche areas within 30 days before arrival in Australian territory.
- Option 3: Implementing an alternative management practice pre-approved by DAFF. Applications for this option must be submitted at least 30 days before arrival.
Simply having a compliant antifouling coating is not considered an accepted biofouling management practice on its own. The coating must be actively managed and documented.
AMSA, Port State Control, and Marine Order 98
While DAFF manages the biosecurity risks of invasive species, AMSA administers the environmental protection side through the Anti-Fouling Systems (AFS) Convention and port state control (PSC) inspections. AMSA's 2024 Annual Inspections Report, published in May 2025, recorded a 5.9% detention rate across 2,264 initial PSC inspections. Deficiencies related to safety management systems (ISM) and environmental compliance remain high priorities for inspectors.
Under Australian law, the physical paint systems applied to your hull must comply with Marine Order 98. This regulation sets out the requirements for the survey of anti-fouling systems, as well as the forms for certificates, endorsements, and incident declarations. During a PSC inspection, AMSA will verify that your International Anti-Fouling System Certificate is valid and that the coating does not contain banned organotin compounds or cybutryne. Damage to the antifouling coating during heavy reactive cleaning can trigger AFS non-compliance and accelerate future fouling growth.
Proactive Hull Cleaning vs. Reactive Cleaning
Proactive cleaning involves the frequent, gentle removal of microfouling (slime) before macrofouling (barnacles, tubeworms) can attach. This strategy preserves the integrity of the antifouling coating, reduces hydrodynamic drag, and aligns perfectly with the IMO's 2023 biofouling guidelines (resolution MEPC.378(80)), which superseded the older 2011 guidelines.
Reactive cleaning is the removal of heavy macrofouling. This process is abrasive and often damages the hull's coating. If you are forced to conduct reactive cleaning to meet DAFF's 30-day requirement (Option 2), you risk degrading your AFS, which can lead to rapid re-fouling and potential AMSA scrutiny.
Niche Area Management and Containment
When cleaning is necessary, special attention must be given to niche areas such as sea chests, thruster tunnels, and gratings. These protected zones are hotspots for marine growth. Any in-water cleaning conducted in Australian waters must utilise capture and containment technologies to prevent the release of viable biological material and toxic paint flakes into the local ecosystem.
If you plan to conduct in-water cleaning in Queensland waters, such as near the Port of Brisbane, federal regulations are only the baseline. You need a separate approval from the state government. Operators must contact Biosecurity Queensland (via the Department of Environment, Tourism, Science and Innovation, DETSI) to secure local permission before deploying divers or remotely operated vehicles (ROVs).
Actionable Takeaways for Your Next Australian Arrival
Preparing for an Australian port call requires seamless coordination between the vessel's master, the technical management team, and the local agent. Consider these practical steps:
- Audit Your Documentation: Ensure your Biofouling Management Plan and Record Book are fully updated and align with ABFMR Version 4. This is the simplest way to satisfy DAFF's Option 1.
- Monitor Coating Condition: Regularly assess the health of your antifouling system. Do not wait for heavy macrofouling to accumulate. Schedule proactive microfouling grooming where permitted.
- Plan Cleaning Locations Carefully: If you must clean within 30 days of arrival (Option 2), verify that the cleaning vendor at your foreign departure port uses compliant capture technology and provides a detailed report that meets ABFMR Appendix B standards.
- Leverage Smart Tools: Use digital solutions to simplify your pre-arrival workflow. The Berthfile biofouling copilot can help operators navigate MARS reporting requirements and ensure all documentary evidence is ready for DAFF inspection.
By prioritizing proactive hull management and understanding the distinct roles of DAFF and AMSA, operators can ensure smooth, delay-free port calls in Brisbane and across Australia.
Disclaimer: This article provides general information and does not constitute legal or regulatory advice. Always consult official DAFF and AMSA resources for the most current requirements.