Underwater Cofferdam Installation Thailand for Speed Log Replacement
- MaxiDive
- May 6
- 3 min read
Project Overview
MaxiDive successfully completed an underwater cofferdam installation Thailand project at Ko Si Chang Anchorage to support the replacement of a vessel’s speed log transducer.
The operation required underwater blanking using a waterproof cofferdam system, allowing the technician to carry out the replacement safely while the vessel remained afloat. This approach helped avoid dry docking, minimize operational disruption, and maintain safe working conditions throughout the project.
The work was performed under moderate sea conditions with approximately 5 meters of underwater visibility.
Underwater Cofferdam Installation Thailand Scope of Work
The underwater cofferdam installation Thailand scope included:
Locating the speed log position on the hull
Confirming the blanking location using vessel drawings
Installing a waterproof cofferdam system
Securing the cofferdam in place during replacement work
Supporting the technician during speed log transducer replacement
Monitoring for leakage during and after installation
Removing the cofferdam after successful completion
Final underwater inspection and photo documentation
The purpose of the cofferdam was to isolate the working area externally and allow the onboard replacement process to be carried out safely.
Cofferdam Waterproof System and Blanking Operation
The blanking operation was performed using a cofferdam equipped with a powerful magnetic system to secure it against the hull.
Once the diver identified the speed log location, inspection photos were taken before the operation began. The cofferdam was then positioned and secured in place, creating a controlled barrier around the transducer area.
After the cofferdam was secured, the vessel’s technician proceeded with the replacement while MaxiDive divers remained on standby to monitor the external seal and confirm safe working conditions.
The underwater cofferdam installation Thailand operation was completed without leakage, hazards, or abnormalities.
Speed Log Transducer Inspection Before Replacement
Before replacement, MaxiDive carried out an underwater inspection of the existing speed log transducer.
The inspection showed visible cracks and scratches on the transducer faceplate, indicating possible mechanical impact or surface damage.
Documenting the condition before replacement was important for:
Technical verification
Maintenance records
Client reporting
Confirmation of replacement necessity
This inspection step provided clear visual evidence of the component condition before the new unit was installed.
Speed Log Transducer Replacement Support
During the replacement process, MaxiDive divers maintained the cofferdam position and continued monitoring the work area.
The technician completed the speed log transducer replacement while the divers remained in position until leak-free confirmation was received.
After the replacement was completed, the cofferdam was removed, and a final underwater inspection was performed.
The replacement result confirmed:
Transducer installed correctly
Mounting points secure
Surface flat and smooth to hull plating
No leakage detected
No abnormalities observed
Why Underwater Cofferdam Installation Matters
Underwater cofferdam installation Thailand is a valuable solution for vessel operators when underwater fittings, sensors, or hull-mounted equipment require repair or replacement without dry docking.
This method supports:
Reduced vessel downtime
Safe replacement of underwater equipment
Lower operational costs compared with dry dock
Fast response at anchorage or port
Controlled leak prevention during onboard work
For shipowners and managers, underwater cofferdam and blanking operations provide a practical way to complete urgent maintenance while keeping the vessel operational.
Technical Outcome
The project was completed successfully.
Final results:
Cofferdam secured safely
Speed log transducer replacement completed
No leakage detected during the operation
No post-replacement abnormalities observed
Underwater inspection and photo documentation completed
This underwater cofferdam installation Thailand case demonstrates MaxiDive’s ability to support complex vessel maintenance operations directly at anchorage.
MaxiDive Underwater Blanking and Cofferdam Services in Thailand
MaxiDive provides professional underwater blanking, cofferdam installation, and underwater ship repair support across Thailand.
Our capabilities include:
Underwater cofferdam installation
Speed log and transducer replacement support
External blanking operations
Underwater inspection and reporting
Emergency underwater repair support
Commercial diving services at ports and anchorages
With certified commercial diving teams and nationwide operational coverage, MaxiDive supports shipowners, managers, and technical service providers with reliable in-water solutions.
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