Tail Shaft Wear Down Measurement Thailand for Underwater Shaft Inspection
- MaxiDive
- May 28
- 3 min read
MaxiDive Co., Ltd. completed a tail shaft wear down measurement Thailand project for a commercial vessel at Koh Si Chang, Thailand. The underwater work was performed to record rope guard / tail shaft wear down measurements using poker gauge equipment and CCTV visual documentation.
Tail shaft wear down measurement is an important technical inspection service for vessel managers, technical superintendents, and class representatives. It helps document shaft-related clearance values while the vessel remains afloat, supporting technical review, maintenance planning, and class-related assessment without immediate dry docking.
Tail Shaft Wear Down Measurement Thailand Scope
The tail shaft wear down measurement Thailand scope included diver attendance, underwater inspection, poker gauge measurement, CCTV documentation, and delivery of measurement photographs and video to the vessel’s master.
The work included:
diver deployment at anchorage;
underwater access to the rope guard / shaft area;
poker gauge measurement;
top and bottom measurement recording;
CCTV visual documentation;
photographic evidence of measurement readings;
reporting for vessel technical review.
The equipment used included a KBM 28B system and CCTV VIC system, supporting clear underwater documentation during the measurement process.
Poker Gauge Measurement Results
The inspection diver successfully recorded the required measurements. The rope guard measurements were documented as follows:
Bottom position — 95.90 mm
Top position — 95.50 mm
Both measurements were successfully recorded and supported with photographic and video documentation. The completed measurement package was delivered to the vessel’s master for review and record keeping.
Poker gauge measurement provides a practical method for documenting shaft-related clearance values during afloat inspection. When supported by underwater video and photographs, it gives the vessel’s technical team clear evidence for maintenance planning and class-related evaluation.
Underwater Measurement Documentation
For tail shaft and rope guard measurement work, clear documentation is essential. Underwater conditions, access limitations, and the precision required for measurement-based inspection mean that the diving team must carefully position the measurement tool, capture readable values, and confirm that the recorded data is suitable for technical review.
MaxiDive’s underwater measurement process included both photo and video support. This helps ensure that the recorded values are not only written in the report, but also visually documented for reference.
Why Tail Shaft Wear Down Measurement Matters
Tail shaft wear down measurement helps vessel managers monitor the condition of the shaft arrangement and related components. Recorded measurements can be used as part of maintenance history, dry-dock planning, and technical/class review.
This type of underwater measurement helps support:
shaft condition monitoring;
maintenance planning;
class-related documentation;
comparison with previous measurement records;
early identification of possible wear trends;
reduced need for immediate dry-dock attendance;
better technical decision-making while the vessel remains afloat.
Even when no immediate repair is required, accurate measurement data provides a useful baseline for the vessel’s technical department.
Class-Related Inspection Support
The project was performed in a class-related context, with inspection attendance and technical measurement documentation required. MaxiDive supports vessel owners, managers, and class representatives with underwater inspections, measurement services, rudder clearance checks, shaft-related measurement work, hull inspections, and photographic / CCTV reporting.
Class-related underwater measurement work requires disciplined reporting, clear visual evidence, and reliable diver communication. The recorded values must be presented in a way that can be reviewed by technical stakeholders and compared with vessel records or previous measurements where applicable.
Commercial Diving Support at Koh Si Chang
Koh Si Chang is one of Thailand’s key anchorage areas for commercial vessels requiring underwater inspection, maintenance, measurement, and class-related support. MaxiDive provides commercial diving services at Koh Si Chang and across Thailand’s major ports and anchorages.
With 2,111 completed projects, 964 clients, 21 locations, and 5 diving units, MaxiDive supports shipowners, managers, technical departments, charterers, and class representatives with structured underwater services throughout Thailand.
Conclusion
MaxiDive successfully completed the tail shaft wear down measurement Thailand project at Koh Si Chang. The diving team recorded poker gauge measurements at both the bottom and top positions, with values of 95.90 mm and 95.50 mm respectively.
The completed underwater measurement package, including photographic and video documentation, was delivered for vessel technical review. This project demonstrates MaxiDive’s capability to support class-related underwater measurement work, shaft inspection, and technical reporting while the vessel remains afloat.
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