Subsea Survey & Bathymetric Mapping — Seine

Tidal from Rouen to its mouth at Le Havre, the Seine carries a mix of commercial and leisure traffic through a channel that shifts with the estuary's tidal dynamics.

An estuary that moves means charts age fast — near-shore rescanning matters more here than on a fixed inland reach.

What this survey work covers

Small RIBs give access to the shallow, congested, and often poorly-charted water that larger survey vessels can't reach — inside marinas, along seawalls, up river channels, and close against structures. Combining multibeam sonar for the underwater surface with photogrammetry for the shoreline and any structures above the waterline produces a single 3D model spanning both, rather than two separate datasets that have to be stitched together after the fact.

What it's used for

• Environmental and habitat monitoring — tracking change in the seabed or shoreline over repeat surveys.
• Marina, mooring, and port infrastructure condition surveys.
• Pre-construction and dredging bathymetry, and cable or pipeline route surveys.
• Baseline data feeding a heritage or environmental impact assessment where one applies.

Working in the Seine area

If there's a subsea survey or bathymetric mapping requirement in the Seine area — a single site or an ongoing monitoring programme — get in touch to discuss scope and timing.