In-Water Survey with Propeller and Hull Condition Review at Laem Chabang Port

MaxiDive completed an in-water survey at Laem Chabang Port, documenting hull plating, appendages, propeller assemblies and rudder condition.

MaxiDive completed an In-Water Survey for a commercial vessel at Laem Chabang Port, Thailand. The underwater inspection was carried out to document the condition of hull plating, appendages, propeller assemblies, stern tube and rudder components while the vessel remained afloat.

The work was performed under calm sea state conditions with approximately 1.5 meters of underwater visibility. MaxiDive’s commercial diving team used SSDS system and measurement tools to complete the underwater inspection and technical documentation scope.

The commercial diving team prepared inspection equipment before starting the underwater survey and condition documentation.

In-Water Survey: Service Scope

The requested underwater work focused on in-water survey and vessel condition documentation. This type of inspection helps shipowners, vessel managers, class representatives and technical teams review the vessel’s underwater condition without immediate dry docking.

The main inspection scope included:

• hull plating inspection;

• soft marine growth documentation;

• bow area and coating condition review;

• flat bottom inspection;

• weld seam condition observation;

• appendage inspection;

• sea chest grating checks;

• discharge and drain plug inspection;

• bilge keel condition review;

• ICCP area inspection;

• propeller blade, hub and boss inspection;

• stern tube condition review;

• rudder assembly inspection;

• underwater photo/video documentation.

MaxiDive’s diving team carried out the in-water survey while the vessel remained afloat at Laem Chabang Port.

Hull Plating Condition

The vessel was found lightly covered by soft marine growth, comprising algae on the port and starboard sides.

Loss of top coat consistent with abrasion from the vessel’s anchor chain was noted in the bow area. Where visible, the paint throughout the vessel was found in good condition; however, some areas of bare steel were noted.

The flat bottom was reported free from grounding and abnormalities. The overall top coat and weld seams were intact. No concave weld seams were noted, and no damage or structural anomalies were reported.

The in-water survey included underwater photo and video documentation for the vessel’s technical review.

Appendage Inspection

The underwater inspection also covered appendages and related components. The transducers were securely in place.

All sea chest gratings were secure and fastened in place. The discharges were free from abnormalities. All drain plugs were secure in place, with no leakage noted.

All bilge keels were reported in normal profile with no damage noted. The ICCP area was also reported in normal profile, with no damage noted.

Propeller Assembly Findings

The propeller blades, hub and boss were found lightly covered by soft marine growth. Propeller surface roughness was measured as grade “C” according to Rubert Scale.

Minor contact damage was documented on the trailing edge of the propeller blades. No evidence of cavitation or cracks was reported.

The boss cap cement filling material was missing at the 3 o’clock position. The rope cutter was missing at the 3, 9 and 12 o’clock positions. The stern tube was reported free from structural anomalies.

These findings are important for the vessel’s technical team because propeller blade condition, surface roughness, rope cutter status and stern tube condition can affect future maintenance planning and operational review.

Rudder Assembly Condition

The rudder was lightly scattered with soft marine growth. The paint coat appeared in excellent condition.

The drain plug was secure in place, with no leakage reported. The rudder structure was recorded in good condition, with no abnormalities.

Why In-Water Survey Matters

In-Water Survey helps vessel operators obtain a clear technical record of underwater condition while the vessel remains afloat. It supports class-related review, maintenance planning and early identification of coating wear, appendage issues, propeller damage or underwater component abnormalities.

An In-Water Survey helps technical teams:

• verify hull plating condition;

• document marine growth level;

• review coating loss and bare steel areas;

• confirm flat bottom condition;

• inspect sea chest gratings and appendages;

• check drain plugs and discharges;

• document propeller blade condition;

• measure propeller surface roughness;

• review rudder and stern tube condition;

• plan future maintenance without immediate dry docking.

MaxiDive Commercial Diving Support in Thailand

MaxiDive provides in-water surveys, underwater inspections, UWILD support, hull cleaning, propeller polishing, sea chest cleaning, underwater measurements, emergency underwater repair and commercial diving services for vessels operating in Thai ports and anchorages.

This In-Water Survey at Laem Chabang Port demonstrates MaxiDive’s ability to support vessel technical teams with structured underwater inspection, measurement support and photo/video documentation.

Conclusion

The In-Water Survey at Laem Chabang Port provided the vessel’s technical team with documented findings across hull plating, appendages, sea chest gratings, ICCP areas, propeller assemblies, stern tube and rudder components.

MaxiDive’s commercial diving team completed the requested inspection scope and delivered underwater documentation to support condition review, class-related assessment and future maintenance planning.

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