International Dredging Review

International Dredging Review
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Coastline Surveys Ltd. (CSL) completed three high-resolution multi-beam hydrographic surveys in the South North Sea using the latest generation R2SONIC 2024 combined with an IxBlue Octans MKIII Gyro/ MRU and C-Nav 3050 RTK GPS positioning. The CSL survey vessel MV FlatHolm completed the three surveys in a short window as weather permitted with minimal downtime the company said.

Andy Johnson CSL head of hydrographic services supervised the vessel mobilization. Detailed preparation including a complete re-survey of the instrument offsets on MV FlatHolm helped with the normal challenges of mobilization CSL said.

With more than 20 frequencies from 200 to 400Hz available during survey operations the upgrade to the Broadband R2SONIC 2024 system produced quick results CSL said. MY FlatHolm can service the European coastal survey area up to 100km offshore and can remain onsite for up to seven days. It is also small enough to operate in shallow water (less than five to six meters or about 16.5-19.5 feet). The vessel is based in Lowestroft U.K.