- info@nagoyaunderwater.com
Get In Touch
Get In Touch
Sooner or later every technical manager faces the same decision: repair the damage now, in the water, or wait for the dry dock. In-water ship repair in Nagoya can be the right answer, but only if the facts support it. Here is how we help owners decide.
Four things matter most: the type of damage, the class requirements, the schedule and the cost. A small crack in a stable area is a good candidate for repair afloat. A broken plate near a tank boundary is not. A ship that has a cargo waiting and no dry dock for weeks may have no sensible alternative to an in-water fix.
A dry-docking can take a week or more once the voyage to the yard, the docking and the undocking are included. A repair afloat in Nagoya can usually be done in a day or two after the plan is agreed. If the ship can keep trading during the work, the saving can be large. If the work needs an extended stay, the saving shrinks.
The Diver team costs money, and so do materials and class attendance. But a dry-docking costs yard fees, tug and pilot services, off-hire, and sometimes a ballast voyage. For small and medium repairs, the in-water option is often cheaper in total. For major work, the dock may be better value.
The class society decides whether a repair afloat is acceptable and whether it is temporary or permanent. The surveyor will want to see the damage on video and agree the method. If the repair is temporary, the society may set a deadline for permanent repair. Flag state and port state requirements may also apply. We prepare the documents the surveyor needs.
Repairs in the water have limits. Visibility can be poor, current can interrupt the work, and quality can be harder to control than in a workshop. Our team plans for these risks with a clear method, checks and a backup if the weather turns. We also tell the owner honestly if we think the repair is unlikely to last.
Send us the ship's details, the nature of the damage, photographs if you have them, and the timeline. We inspect, give a written recommendation and, where it fits, a price for the in-water repair. The owner and the surveyor then choose with the full facts in hand.
Take a ship with a damaged overboard valve flange. Dry-docking would cost days and a ballast leg. A Diver inspects the damage, the engine room isolates the system, the opening is blanked with a temporary plate, and the flange is repaired or replaced. The ship sails on schedule with a report showing what was done. The permanent repair, if needed, is planned for the next docking.
Most owners ask how long the repair will last, whether class accepts it and what the risk is if it fails. We answer each plainly, in writing, before the work begins.
Q1. How long does a repair afloat usually take?
Many repairs can be done in 1 to 2 days once the plan is agreed, compared with a week or more for a dry-docking including transit.
Q2. What costs does a dry-docking add?
Yard fees, tug and pilot services, off-hire and sometimes a ballast voyage to reach the yard.
Q3. Who decides if an in-water repair is acceptable?
The class society. The surveyor reviews the damage, the method and the plan, and decides whether the repair is temporary or permanent.
Q4. What documents does the surveyor need?
The inspection video, the repair plan, the welding procedure and welder qualifications, and the materials list.
