Underwater hull cleaning is an important aspect of ship maintenance that involves removing marine growth and other debris from the ship’s hull. Over time, marine growth such as barnacles, algae, and other organisms can accumulate on the hull, increasing the ship’s drag and reducing its performance. Underwater hull cleaning can restore the ship’s efficiency and prolong its lifespan.

Methods of Underwater Hull Cleaning

There are several methods for underwater hull cleaning, each with its own advantages and disadvantages. Some of the common methods include:

• Brush cleaning: This method involves using brushes and scrapers to remove marine growth and other debris from the hull. It is the most common method and can be done by divers or remotely operated vehicles (ROVs).
• High-pressure water jetting: This method involves using high-pressure water jets to remove marine growth and other debris from the hull. It is more efficient than brush cleaning and can be used to clean hard-to-reach areas.
• Chemical cleaning: This method involves using chemicals to dissolve marine growth and other debris from the hull. It is less common than other methods and requires careful handling and disposal of the chemicals used.

Underwater hull cleaning is essential to maintain the ship’s performance and prolong its lifespan. A fouled hull can increase the ship’s drag, which leads to reduced speed, increased fuel consumption, and higher emissions. In addition, marine growth can cause corrosion and damage to the hull, which can lead to costly repairs.

Importance of Underwater Hull Cleaning

Regular hull cleaning can help prevent these issues and keep the ship running efficiently. The frequency of cleaning depends on various factors such as the vessel’s operating conditions, the type of marine growth, and the type of hull coating. Some vessels may require cleaning every few months, while others may only need it once a year.

Underwater hull cleaning can pose risks to divers and the environment if proper precautions are not taken. Divers must be trained and equipped with proper safety equipment to ensure their safety while cleaning the hull. In addition, underwater hull cleaning can release pollutants such as copper and other heavy metals into the water, which can harm marine life.