Blog · Hull Cleaning & Coatings
Hull Cleaning in 2026: Proactive Coatings & DAFF Compliance
Navigating In-Water Cleaning: Proactive vs. Reactive Strategies
Ship operators preparing for Australian port calls face a dual challenge: complying with strict biosecurity rules for hull fouling and maintaining the integrity of their vessel's antifouling coating. The decision to undertake in-water hull cleaning, whether proactive grooming or reactive heavy cleaning, has significant operational and regulatory implications. This is especially true for vessels bound for the Port of Brisbane, where both federal entry rules and stringent Queensland state regulations apply.
Under the Biosecurity Act 2015, the Department of Agriculture, Fisheries and Forestry (DAFF) mandates biofouling management for all international arrivals. DAFF's biofouling rules for vessels dictate that arriving ships must utilize one of three accepted management practices: operating under an approved Biofouling Management Plan (BMP) with an accompanying record book, cleaning all biofouling within 30 days prior to arrival, or relying on a DAFF pre-approved alternative management practice. It is critical to remember that simply having a compliant antifouling coating alone is not an accepted practice for entry into Australian waters.
The Mechanics of Proactive vs. Reactive Hull Cleaning
Understanding the distinction between proactive and reactive in-water cleaning is essential for modern fleet operations. Proactive cleaning, often referred to as hull grooming, involves the frequent, gentle removal of the microscopic slime layer (micro-fouling) before larger marine organisms can settle and calcify. Because the fouling is light, this process generally utilizes soft brushes or non-contact water jets.
Reactive cleaning is deployed when a vessel has already accumulated macro-fouling, such as barnacles, tubeworms, and mature algae. Removing these stubborn organisms requires aggressive mechanical brushing or high-pressure blasting. This approach carries a significantly higher risk of damaging the vessel's hull coating, releasing toxic biocides into the water column, and dispersing viable invasive species.
The Impact on Coating Condition and AFS Convention Compliance
While an antifouling coating alone does not guarantee biosecurity compliance, its condition dictates your dry-dock intervals and environmental compliance under international law. The Australian Maritime Safety Authority (AMSA) administers the Anti-Fouling Systems (AFS) Convention domestically.
AMSA continuously monitors compliance through its port state control regime and recently updated its requirements via Marine Order 98 (Marine pollution - anti-fouling systems), which fully integrates the ban on cybutryne. When operators resort to heavy reactive in-water cleaning, they risk rapidly depleting the biocidal layer of their AFS coating. Over time, this degradation not only weakens the vessel's defense against future fouling but may also force an early and costly dry-docking to reapply the coating to maintain a valid International Anti-fouling System Certificate.
Niche Area Management and Queensland's Strict Regulations
The updated Australian Biofouling Management Requirements for Commercial Vessels (ABFMR-CV) Version 4, which took effect on 30 April 2026, places heavy emphasis on comprehensive cleaning. Appendix B of the ABFMR dictates the minimum information that must be recorded in an in-water cleaning report, explicitly highlighting the need for detailed niche-area management. Areas such as sea chests, thruster tunnels, rudder hinges, and gratings are notorious hotspots for marine growth. Cleaning a vessel's vertical sides while ignoring these complex geometries will not satisfy DAFF requirements.
Furthermore, reactive cleaning typically triggers strict capture and containment mandates to prevent environmental contamination. For vessels calling at the Port of Brisbane, operators must be aware that in-water hull cleaning requires separate, specific approvals from Queensland state authorities (such as Biosecurity Queensland) on top of federal requirements. The state demands robust containment systems that can capture displaced organisms and filter contaminated effluent before it is returned to the sea.
Aligning with IMO 2023 Guidelines
To support a globally consistent standard, the International Maritime Organization (IMO) adopted the 2023 Guidelines for the control and management of ships' biofouling. Known formally as resolution MEPC.378(80), these guidelines supersede the previous 2011 version. As outlined on the IMO's biofouling portal, these updated standards advocate for continuous, proactive maintenance and rigorous documentation.
While the IMO guidelines remain voluntary internationally, Australia's ABFMR enforces a binding minimum standard for entry. Aligning your vessel's operational procedures with the IMO 2023 Guidelines is the most effective strategy to ensure seamless compliance with DAFF's MARS pre-arrival reporting regime.
Actionable Takeaways for Ship Operators and Agents
- Audit Coating Compatibility: Before scheduling any in-water cleaning, consult the coating manufacturer to ensure the chosen method will not invalidate your AFS certification or prematurely trigger a dry-dock cycle.
- Prioritize Niche Areas: Ensure your chosen in-water cleaning service provider has the specialized equipment required to safely access and document the condition of niche areas. Incomplete cleaning reports that omit thruster tunnels or sea chests violate ABFMR Version 4 requirements.
- Check Local Jurisdictions: If planning a clean in Moreton Bay or anywhere in Queensland waters, secure state-level capture and containment approvals well in advance of your vessel's arrival.
- Leverage Digital Compliance Tools: Master your MARS reporting by utilizing Berthfile's biofouling copilot to draft accurate pre-arrival reports, and routinely check your port state control risk profiles to avoid unexpected AMSA detentions.
Disclaimer: This article provides general information and does not constitute legal or regulatory advice. Always consult official DAFF, AMSA, and state guidelines before executing compliance activities.