Hull cleaning
refers to the process of removing biofouling, marine growth, and other impurities that accumulate on the hull of a ship or boat. The hull is the bottom part of the vessel that comes into direct contact with water. Over time, various organisms, such as barnacles, mussels, algae, and slime, can attach themselves to the hull, leading to increased drag and reduced performance.
Hull cleaning is essential for maintaining the efficiency and maneuverability of the vessel. It helps improve fuel efficiency by reducing drag, which can result in significant cost savings and environmental benefits. Regular hull cleaning also prevents the spread of invasive species from one body of water to another, protecting the marine ecosystem.
There are different methods used for hull cleaning, including:
Diving: A hull diver manually scrapes off the marine growth using specialized tools, such as brushes, scrapers, or pressure washers. This method requires trained divers and is commonly used for smaller vessels or in locations where access to dry docks or specialized cleaning equipment is limited.
High-pressure water jets: This technique involves using powerful water jets to remove fouling from the hull. The jets dislodge the organisms and debris without causing damage to the hull surface. Water jets can be operated by divers or by remote-controlled systems mounted on a robotic arm.
Mechanical devices: Some vessels use mechanical devices attached to the hull, such as brushes or rotating disks, to automatically clean the hull while the ship is in motion. These devices scrape off the marine growth and prevent its accumulation, minimizing the need for regular manual cleaning.
It’s important to note that hull cleaning should be carried out in accordance with local regulations and environmental best practices to prevent the release of harmful substances into the water. Additionally, certain antifouling coatings may require specific cleaning methods to avoid damaging their effectiveness
Cost of implementation
The price of hull cleaning will depend on the selection between a diver and a ROV, in addition to the vessel size. Total cost will be in the range of $5,000 to $50,000 (USD).