Posted by July 6, 2017

French Bathymetric Survey Vessel Renovated and Refurbished

  • Photo: MacArtney Group
  • Photo: MacArtney Group
  • Photo: MacArtney Group Photo: MacArtney Group
  • Photo: MacArtney Group Photo: MacArtney Group
Global multibeam solution provided by MacArtney guarantees functioning of bathymetric surveys carried out close to the harbor of Bayonne in the southwest of France.
 
Located on the western border between Basque Country and Gascony, the harbor of Bayonne belongs to the region Nouvelle-Aquitaine which is under obligation to provide information to the various harbor operators about the depths in the areas of the harbor.
 
MacArtney France is the supplier of the multibeam solution for the bathymetric vessel ‘Ingénieurs Lesbordes’ and is likewise the integrator of the diverse steps of modification which were imperative to the successful adaptation of the vessel to the prevailing International Hydrographic Organization (IHO) survey standards.
 
The bathymetries produced are essential for navigation (permissible draft, obstacles) and dredging operations (decision support, control) and they are also necessary for the hydro-sedimentary knowledge of the river Adour, the various channels of access to the harbor, as well as for the supervision of works and the monitoring of the structures.
 
The Bayonne vessel has been equipped with MacArtney’s multibeam solution consisting of a Kongsberg Maritime EM 2040P shallow water multibeam echo sounder, a Valeport miniSVS sound velocity sensor, an Ixblue Hydrins inertial navigation system which is a hydrographic survey INS, and a Trimble SPS 855 GNSS modular receiver combining the radio and GPS receiver in a single housing.
 
The measures of vessel modification called for overall responsibility on the part of MacArtney France for implementing the following steps:
  • cut the hull, create a moonpool and a blister
  • create a mechanical system for moving up and moving down the multibeam echo sounder
  • integrate the multibeam echo sounder, the inertial motion unit, the GNSS receiver and the sound velocity sensor
  • modify the electricity on board and addition of a DC/AC converter
  • modify the interior fittings of the vessel
 
MacArtney noted that the data acquisition conditions in the Nouvelle Aquitaine region are very difficult; the water is very turbid and the variability of the sound velocity, in both space and time is significant. In addition to this, logs are frequently being carried by the Adour River, for which reason the system installed has been manufactured in a heavy-duty design, thus ensuring a sturdy structure. The bathymetric system demonstrates great accuracy of a quality being superior to the requirements made by the IHO.
 
The vessel now meets the requirements for bathymetric surveying carried out throughout the administrative perimeter of the harbor of Bayonne as well as on the sediment immersion areas of dredging at the coast or offshore and environmental monitoring areas for dredging.
 
“We have experienced a very fruitful working relationship with the various business partners having been involved in making this project succeed,” said David Mazzochi, Managing Director of MacArtney France. “The owners of this modified bathymetric vessel, region Nouvelle Aquitaine, has expressed respect and contentment with the serious and professional workflow presented by our staff during the installation, tests, validation and training.”
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