UNDERWATER MAINTENANCE
Maintenance service includes underwater hull cleaning, underwater propeller polishing, underwater fitting anode, underwater replacement anodes, u/w search & recovery anchor chain (cable), underwater sea chests & gratings cleaning, temporary underwater plugging sea chests (waterproofing), and bow thrusters maintenance.

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UNDERWATER INSPECTION
The in-water survey includes of video taking, periodic inspection of channel buoy for anchor/DMA/chain, pre and post-installation survey for cable and pipelines, ship inspection for propeller clearing, underwater photography and underwater measurements, underwater clearance measurements of rudder pintles and tail-end shaft wear down measurements, a survey of coastal structures and underwater survey of underwater constructions.


UNDERWATER REPAIRS
Underwater repairs include underwater cutting & welding, underwater waterproofing, propeller repair, propeller cutting (cropping), underwater propeller polishing, underwater rudders repair, replacement rope cutter, underwater repair bow thrusters.

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SPECIALISED UNDERWATER MAINTENANCE
Maintenance includes submarine and coastal structures, installation of underwater pipelines, installation of underwater cables, underwater pipe inspection. Construction and maintenance of ports. Shipwreck salvage (refloating), shipwreck cutting, shipwreck removal.

Underwater pile visual inspection - Visual examination of the damage and stress of the pile structure​ in HK, a visual inspection of pile carried out periodically, it is essential for pile maintenance. In the visual survey, we look for signs of damage and stress on the pile structure.​​

Underwater pile protection Wrap - Install protection wrap on the pile to prevent deterioration. After a period of time, underwater structures like piles start to deteriorate, to protect against the decay in the pile structure, a protection wrap should be installed.

​Underwater pile thickness measurement - Use the ultrasonic thickness gauge to measure the pile’s thickness against the original reading. The measure of the pile's thickness is part of the pile inspection procedure. After a period of time, the unprotected pile starts to deteriorate, in order to find out the deterioration level, an ultrasonic thickness gauge can be used to compare the pile's thickness with the original reading.

Underwater seawall & seawall toe condition survey - Seawall is the first line of defense to protect the shoreline, high sea wave continuously hit the seawall and result cavity between block displace and the concrete blocks, to check the seawall condition, we carry out seawall and seawall toe condition survey.​ A condition survey is essential, a guideline for further maintenance work.