Hydrography contributes to a better knowledge of the marine and coastal environment through a wide variety of measurements and instruments.

Bathymetric survey

We measure the depth of the seabed in order to map the area, showing the underwater relief.

These bathymetric measurements can be carried out at sea, rivers or lakes. Depending on your project, we can perform single or multibeam surveys, which are sometimes supplemented by topographic observations in the intercostal area. This data is then processed for use: feed a dynamic model, generate a navigation map, assess volumes, or are processed and valorized through our web applications.

Our team is composed of qualified hydrographers category A manager or B technician, experienced, and we work in compliance with the recommendations of the IHO (International Hydrographic Organization) to ensure reliable and accurate data.

Side scan sonar

Side-scan sonar is an instrument that can reveal the presence of anomalies or remarkable relief on the seabed.

The information collected by side-scan sonar imagery is used to highlight the existence of debris on the seabed (wreck, chains) and other obstructions (rock outcrops) that may be hazardous to navigation or to subsea installations, such pipelines, cable routes, platform positioning and construction works.

High-resolution imagery creates geo-referenced mosaics that make it easier to locate and help us understand and classify these underwater objects. Each remarkable object is then reported in a contact form that provides its position, size and, where possible, its identification.


Magnetometric investigations are specifically used for the detection of ferrous objects at sea.

Detection targets the dispersed debris of all sizes and shapes such as wrecks, anchors, chains, cables, pipelines, and sometimes munitions (UXO, UneXploded Ordnance).

The magnetometer can detect either metallic objects laid on the seafloor or buried in sediments, depending on their mass and distance.

On a larger scale, magnetometric surveys can also be used for geological analysis to help in the understanding of the structure and morphology of the seabed.


Coastal survey

The coastal studies concentrate a wide range of techniques in a single activity

In coastline area from shallow depths to the coast, the conditions are as varied as your projects.

Working around difficult conditions and accessing difficult locations, we may have to perform bathymetric measurements using jet skis in rough seas, deploy drones, scan the shoreline morphology using LiDAR or photogrammetry etc… It is hence often necessary to aggregate topographic data of different planimetric and altimetric resolutions to produce a unified Digital Elevation Model (DEM).

In these occasions, Deparentis is able to meet the challenges with professionalism and a high level of safety.