Case Study: Implementing Sustainable Underwater Cleaning Practices in Busy Indonesian Ports

Sustainable underwater cleaning practices have gradually become a practical necessity in Indonesian ports where vessel traffic remains high and environmental oversight continues to tighten. In numerous underwater cleaning operations conducted across major commercial terminals, structured and environmentally controlled methodologies have been applied to restore hull performance without disrupting port efficiency.

Operational Conditions in High-Traffic Indonesian Ports

Most major Indonesian ports operate under continuous cargo activity, limited berth flexibility, and strict supervision of underwater works. Any activity beneath the waterline is typically subject to approval, documentation, and environmental control measures.

Across many underwater cleaning cases, marine growth accumulation on hull surfaces had gradually increased as part of normal trading exposure. Increased resistance through the water had led to higher fuel consumption and less stable speed performance. While hull cleaning was necessary, conventional aggressive methods were not considered suitable in environmentally monitored port areas due to concerns over uncontrolled debris release and coating damage.

Under these operational conditions, sustainable underwater cleaning practices were selected as the appropriate technical solution.

Structured Preparation and Regulatory Alignment

In most Indonesian underwater cleaning operations, implementation began with underwater inspection to assess fouling density and coating condition. The findings were used to determine the appropriate cleaning intensity and equipment selection.

Before cleaning commenced, method statements and environmental safeguards were submitted to port authorities for review. Approval was granted once debris control measures, diver procedures, and monitoring arrangements were confirmed.

By aligning technical preparation with regulatory requirements from the outset, sustainable underwater cleaning practices were executed as planned operations rather than reactive maintenance measures.

Controlled Application of Sustainable Cleaning Practices

In these operations, controlled brush systems were generally applied instead of heavy mechanical scraping tools. Calibrated rotating brushes were used to remove soft and medium marine growth while preserving antifouling coating integrity.

Cleaning was performed progressively across defined hull sections. This approach allowed visibility to be maintained and environmental control to be monitored continuously. Water turbidity and surrounding conditions were observed throughout the operation to ensure that environmental thresholds were not exceeded.

Coordination with cargo activities was maintained so that cleaning could be completed within the vessel’s scheduled port stay. As a result, berth occupancy was not extended and port productivity was preserved.

Through disciplined sequencing and controlled equipment use, sustainable underwater cleaning practices were integrated smoothly into active port operations.

Operational Improvements Observed

Following completion of underwater cleaning across multiple cases, measurable operational benefits were consistently recorded. Reduced hull resistance contributed to lower fuel consumption during subsequent voyages. Speed performance stabilized and engine load distribution improved under normal service conditions.

In addition, preservation of coating integrity reduced the likelihood of premature maintenance interventions. Extended intervals between dry docking were supported by the avoidance of excessive abrasive cleaning.

Environmental monitoring conducted during these operations confirmed that debris dispersion was controlled and no significant regulatory findings were reported. Compliance standards were maintained throughout the cleaning process.

These outcomes indicate that sustainable underwater cleaning practices can enhance operational performance while meeting environmental obligations.

Environmental Considerations in Indonesian Ports

Environmental awareness within Indonesian ports continues to increase, particularly regarding water quality protection and prevention of invasive species transfer. Underwater cleaning activities are therefore expected to demonstrate clear environmental control.

By utilizing calibrated equipment and controlled procedures, the release of marine residues into port waters was minimized. Such practices align with broader sustainability objectives within the maritime sector, including improved fuel efficiency and emissions reduction supported by optimized hull condition.

Sustainable underwater cleaning practices therefore support both operational efficiency and environmental stewardship.

Implementation Principles Identified Across Cases

Experience from multiple underwater cleaning operations in Indonesia has demonstrated that successful implementation depends on several consistent principles:

• Pre-cleaning underwater inspection and technical evaluation
• Formal regulatory approval prior to commencement
• Use of controlled, non-aggressive cleaning equipment
• Close coordination with ongoing port activities
• Continuous supervision and environmental monitoring

When these elements are applied systematically, underwater cleaning can be performed responsibly even in congested port environments.

Long-Term Operational and Environmental Benefits

Sustainable underwater cleaning practices generate measurable long-term advantages, both environmentally and operationally. Controlled cleaning methods significantly reduce the release of marine growth and coating residues into port waters, supporting water quality protection and aligning with increasingly strict environmental oversight in Indonesian ports.

Operational performance is also strengthened over time. When antifouling coatings are preserved during cleaning, hull resistance is reduced without compromising protective systems. Improved hydrodynamic efficiency contributes to lower fuel consumption, more stable engine loads, and reduced emissions across successive voyages.

Maintenance predictability is further enhanced. By avoiding unnecessary coating damage and excessive abrasive cleaning, dry docking intervals can be optimized and unexpected technical interventions minimized. Sustainable underwater cleaning practices therefore support environmental responsibility while reinforcing long-term vessel efficiency.

References:

• Aasen, A. V. (n.d.). Enhancing vessel performance: the critical role of hull cleaning. Retrieved from ODFJELL: https://www.odfjell.com/about/our-stories/enhancing-vessel-performance-the-critical-role-of-hull-cleaning/
• Essential Hull Cleaning Techniques: Maximizing Vessel Performance. (n.d.). Retrieved from Global Marine Heritage: https://globalmarineheritage.com/hull-cleaning-techniques-vessel-performance/