Fugro Survey A/S recently used the ConCat survey
catamaran to conduct a near shore multibeam survey at Larvik, Norway
. The harbor in Mørjefjorden, south of Larvik has a customized loading berth for export of aggregates excavated in the region.
Water depths at the berth are typically 10 m or less, and an area of
approximately 250 x 50 m must be deepened to facilitate access for larger barges. Fugro Survey was contracted to provide detailed bathymetric charts of the survey site
, and saw ConCat as an excellent platform due to its high portability, and the quality of data from the integrated Kongsberg survey suite. Stein Åsheim, survey manager for Fugro Survey A/S said
"Small multibeam projects such as this can be very expensive in proportion to the actual survey time, due to lengthy mobilization period when using chartered launches. All the survey equipment must
be gathered, delivered to the launch, installed, integrated and finally calibrated". In this project, the complete exercise was completed in one day, acquiring high resolution EM 3000D multibeam echo sounder data. Vessel motion, position and heading were measured via the Seapath 200 system, and all navigation signals were provided by Fugro Starfix.