Underwater Cleaning Methods for Port Vessels

Every vessel entering a port carries not only its cargo but also layers of marine growth accumulated during its journey. This fouling, often made up of algae, barnacles, and biofilm, can reduce a ship’s speed, increase fuel consumption, and heighten emissions. To maintain operational performance and sustainability, underwater cleaning methods for port vessels have become an essential practice in port maintenance routines worldwide. These methods ensure that vessels remain efficient while complying with environmental standards designed to protect marine ecosystems, particularly in regions such as Indonesia where ecological preservation is a growing priority.

Understanding the Purpose of Underwater Cleaning

Underwater cleaning is the process of removing biological and inorganic materials attached to a ship’s hull and underwater structures. Over time, these materials create drag that forces engines to work harder, increasing fuel use and carbon output. Regular cleaning not only improves hydrodynamic performance but also extends the lifespan of hull coatings and reduces the risk of invasive species transfer between ports. Many global shipping companies now integrate underwater cleaning into their scheduled maintenance programs, viewing it as an essential part of sustainable port operations rather than an occasional task.

In Indonesia, where archipelagic waters support thousands of daily vessel movements, the focus on eco-friendly underwater cleaning has intensified. Local authorities and port service providers have begun encouraging the use of methods that minimize disturbance to marine life while ensuring compliance with national environmental regulations.

Mechanical Cleaning Techniques in Modern Ports

The most widely used underwater cleaning method involves mechanical brushing or scrubbing systems. Divers or remotely operated vehicles (ROVs) use hydraulic or electric-powered brushes to remove marine growth from the hull surface. Modern systems feature adjustable brush heads to match different coating types, ensuring that anti-fouling paints remain intact. Some operations use high-precision water jet systems that remove stubborn fouling without damaging protective layers.

In Indonesian ports, mechanical underwater cleaning has been refined to suit tropical waters where fouling rates are faster. Operators often combine manual diver work with advanced ROV tools to reach confined areas, including propellers, sea chests, and thruster tunnels. The result is a balance between precision and safety, achieved under strict monitoring and supervision.

Eco-Cleaning and Environmentally Safe Practices

Eco-cleaning represents the evolution of underwater maintenance in response to environmental regulations and sustainability demands. This method focuses on minimizing pollutant release into surrounding waters by containing removed materials through filtration and collection systems. Suction devices are commonly employed to capture debris, which is then separated and properly disposed of onshore.

In Indonesia, where the Ministry of Environment and Forestry enforces marine protection standards, eco-cleaning methods have gained prominence in environmentally sensitive ports. Operators are expected to use biodegradable lubricants and non-toxic cleaning agents, ensuring no chemical residues enter the marine environment. The use of containment mats beneath the hull during cleaning further prevents the spread of pollutants and marine organisms. These practices align with Indonesia’s commitment to sustainable maritime growth under its national Blue Economy strategy.

The Rise of Robotic and Automated Cleaning Systems

As technology advances, robotic underwater cleaning has emerged as a transformative approach for port maintenance. Automated hull-cleaning robots, equipped with rotating brushes and suction units, can operate with remarkable precision while transmitting live data to operators above the surface. These systems reduce human risk and minimize cleaning time, making them ideal for busy ports where vessels cannot afford extended idle periods.

Indonesian service providers are gradually adopting these robotic systems to enhance efficiency and compliance with international standards. Some units are even capable of performing inspections while cleaning, using integrated cameras and sensors to identify potential coating damage or corrosion. The dual-purpose nature of these machines helps shipowners schedule proactive maintenance and avoid future performance losses.

Environmental Benefits and Port Efficiency

Eco-cleaning and advanced underwater cleaning systems provide measurable environmental benefits. Cleaner hulls significantly reduce fuel consumption, directly lowering greenhouse gas emissions. Research conducted in Southeast Asia indicates that a fouled hull can increase fuel use by up to 40 percent, whereas timely cleaning can reduce this by as much as 20 percent. For ports across Indonesia, such savings translate to lower operational costs and reduced environmental impact across busy trade routes.

Additionally, underwater cleaning supports port efficiency by ensuring vessels spend less time at anchorage or alongside berths for maintenance. Indonesian ports that handle frequent bulk and tanker movements have invested in trained diver teams and eco-cleaning facilities to streamline operations while maintaining environmental integrity. The integration of eco-cleaning systems not only enhances port competitiveness but also demonstrates commitment to sustainable shipping practices.

Compliance and Industry Standards

Compliance with international and national environmental standards has become central to underwater cleaning activities. The International Maritime Organization (IMO) provides guidelines for biofouling management, urging ship operators to adopt eco-friendly cleaning measures and maintain detailed records of hull maintenance. In Indonesia, these regulations are reinforced through the Ministry of Transportation’s directives and port authority requirements.

Service providers must secure permits and ensure waste handling complies with port waste reception facility standards. Collected residues are usually delivered to licensed disposal facilities, ensuring traceability and transparency. By maintaining strict compliance, operators contribute to cleaner waters and uphold Indonesia’s reputation as a responsible maritime hub.

Towards a Sustainable Future in Port Cleaning Operations

The maritime industry’s shift toward eco-cleaning solutions marks a broader transformation in how maintenance is approached. Underwater cleaning is no longer viewed solely as a technical procedure but as a key component of global sustainability efforts. Indonesian ports stand at the forefront of this change, balancing economic activity with environmental preservation. Through continued innovation, collaboration, and compliance, the industry is proving that efficiency and ecology can coexist beneath the surface.

Underwater cleaning for port vessels is evolving rapidly as technology, awareness, and environmental responsibility converge. The adoption of eco-cleaning systems across Indonesia’s ports highlights a collective commitment to cleaner oceans, better vessel performance, and a sustainable future for global shipping.

References:

• Underwater cleaning of ship hull – Explained. (2022, November 4). Retrieved from Ship Nerd: https://shipnerdnews.com/underwater-cleaning-of-ship-hull-explained/
• Why Underwater Hull Cleaning Is Important? (2024, May 3). Retrieved from Nereus: https://www.nereussubsea.com/blog/underwater-hull-cleaning/