One particularly challenging project was undertaken successfully at Sakahlin last year. The self propelled Coastal Worker mobilised to the IJsselmeer with the Neptune built multi-cat type workboat 'Coastal Protector' to handle the four point mooring, the survey vessel 'Coastal Eagle' and another Acta Marine workboat, 'Jacoba 12', which was deployed for traffic control.

The process involves Coastal Worker, which can work at depths ranging from 1m to 25m, lowering an extendable pipe adjacent to the damaged trench while a jet pump cuts and liquifies the soil around the pipeline to recreate a trench of specified depth into which the pipeline can be returned and the pumping process reversed for backfilling. The dredging process is monitored on board by scanning sonar.

Should previous rock cover be impeding progress, a suction system developed by Acta Marine will remove the obstacles to a safe working distance, a process in which effectiveness can be enhanced by working with the tides.

With contracts ongoing for a number of owners and operators of seabed cables and pipelines, Acta Marine has developed an expertise for which there is considerable demand.