Seabed Insights

Geophysical Survey

Geosonic conducts geophysical surveys to characterise seabed and sub-seabed conditions, providing critical insight for routing, foundation design, and hazard identification. Using multibeam, side scan sonar, sub-bottom profiling, and magnetometer systems, we deliver detailed datasets that de-risk cable and pipeline installations, inform offshore structure placement, and support regulatory approval. Our integrated approach ensures safe and cost-efficient project execution.

Typical services provided include:

• Side scan sonar (SSS) seabed imaging
• Sub-bottom profiling (SBP) for shallow geology
• Magnetometer and Gradiometer surveys for ferrous object and UXO detection
• Cable and pipeline route corridor surveys
• Platform and subsea site investigations
• Pre-lay and post-lay cable/pipeline surveys
• As-laid and as-trenched documentation
• Hazard identification (boulders, debris, seabed obstructions)
• Seabed classification and sediment mapping
• Integration with geotechnical sampling and CPT data
• Deliverables in CAD, GIS, and 3D visualisation formats