Seabed Mapping

Government sponsored seabed mapping programmes require acquisition of high quality bathymetric and/or associated geophysical datasets of defined areas of seabed to maintain nautical charts and inform proposed marine protected areas. 

Offshore wind and wave energy developments require comprehensive geophysical site investigation to support consenting, engineering design and environmental statements. 

Dredging operations to support and aggregate extraction, major coastal and port developments are becoming more complex, extending into deeper waters, as merchant vessels increase in size and pressure increases to entend land reclamation. 

Customers for thesse require detailed information on seabed and sub-seabed conditions. 

Gardline provides seabed mapping and related services in shallow and deeper waters, from 1km2 site surveys to 1,000km2 regional mapping programmes lasting 3-4 years. Gardline has developed expertise in management and presentation of large volume datasets to meet client bespoke requirements in both proprietary COTS analytical workstation formats (eg. Kingdom/Oasis Montaj, Caris), CAD (Microstation/AutoCAD) and GIS (ArcGIS/Geomedia) formats. 

Services include:

  • Hydrographic (MBES) surveys
  • Geophysical site surveys: Single and multiple pass surveys acquiring swathe bathymetry, single and multi-channel seismic, sub-bottom profiler, magnetometry
  • Topographic and nearshore surveys
  • Pre and post construction (scour) surveys: MBES and side-scan sonar surveys to determine seabed changes, map debris, evaluate (3D) seabed mobility, accretion and erosion (scour) around installed infrastructure or dredged areas
  • Inspection surveys, depth or burial surveys

Related services include: