A cofferdam creates a temporary watertight enclosure directly against the hull — pumped dry so your team can weld, repair, and inspect without drydocking. Repairs done right at the dock, in days.
Cofferdams are commonly constructed using steel sheet piles driven into the seabed.
“These interlocking sheets circle the repair area and are sealed with packed clay or concrete,”
“We then pump out the water so our divers can access the dry, sealed space.”
Once the cofferdam is installed, divers conduct detailed inspections and require repairs ranging from small corrosion patches to shaft replacements. Hoses provide air and electricity, while suction hoses remove debris and sediment.
Trident, with its extensive experience in underwater maintenance, ensures that every aspect of the repair work adheres to the highest standards of safety and efficiency. Our divers are equipped with state-of-the-art tools and follow a meticulous process to ensure thorough inspections and precise repairs.
For major repairs involving structural reinforcements, dry docks are still preferred. Proper planning is critical to ensure cofferdam installation and repair work proceed smoothly.
Provides a secure and stable working environment
Keeps water out so internal works can be carried out safely and efficiently
Suitable for welding, steel renewal, inspection, piping works and more
Minimises delays and improves project efficiency
Helps contain debris and reduces environmental impact during repairs
"It eliminates the need to transport ships to a different facility. Repairs can be completed right at the dock."
Trident provides specialized, affordable maintenance to keep vessels operating safely and efficiently. Our skilled teams care for your marine assets like they’re our own.
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