Maritime Tips: Prepping Your Fleet for Tier III Compliance

The IMO MARPOL Annex VI Tier III regulations have raised the bar for NOx emissions control in Emission Control Areas (ECAs). For shipowners and operators, compliance is not just a legal requirement—it’s an opportunity to improve efficiency, reduce environmental impact, and stay competitive in a sustainability-driven market.

Tier III Compliance Starts with AUS40

1. Understand Tier III Requirements

Tier III applies to vessels operating in designated ECAs and requires up to 80% NOx reduction compared to Tier I levels. It primarily affects newbuilds but can also impact retrofits in certain cases.

2. Choose the Right NOx Control Technology

Selective Catalytic Reduction (SCR) systems are the most widely used solution for meeting Tier III standards. For optimal SCR performance, the quality and consistency of AUS40 are crucial.

3. Ensure AUS40 Quality and Availability

AUS40 (40% urea solution) is essential for SCR operation. Choosing a supplier with certified quality (ISO 18611), bulk delivery options, and port-to-port coverage can prevent downtime and ensure smooth compliance.

4. Plan for Supply in Different Ports

Ports vary in accessibility and frequency of arrivals. Bulk delivery services can make AUS40 available in remote or less-frequented terminals, ensuring operational continuity.

5. Train Your Crew

Well-trained crew ensures proper handling, storage, and dosing of AUS40, avoiding operational issues and protecting equipment lifespan.

6. Monitor, Maintain, and Document

Continuous emission monitoring and proper recordkeeping are essential for inspections and audits. Preventive maintenance will keep your SCR system efficient and compliant.

Achieving Tier III compliance is not just about installing the right technology, it’s about integrating high-quality AUS40 supply, operational readiness, and a proactive compliance mindset.

Need a reliable AUS40 supply partner?

Contact AUS40 Brazil for bulk deliveries, certified quality, and tailored maritime solutions.