Underwater inspection
Visual, magnetometric and sonar inspection of hulls, quays, port structures and offshore assets.
SEMTEC — Underwater subsidiary of the DEMINETEC Group
SEMTEC is the marine & underwater works arm of the DEMINETEC Group. Our crews operate in freshwater, rivers, harbours and offshore — in mainland French ports, overseas territories and international markets. We deliver the complete subsea offering: hull and submerged structure inspection, underwater UXO clearance, hyperbaric works, afloat repair, underwater welding, refloating, pipeline lay and ROV support.
Our values
Safety
Top priority: divers, assets and bystanders, in line with IMCA best practices and French Decree 2005-1325.
Professionalism
Former Navy clearance divers, IMCA Diving Supervisors, NATO IMEC / CMD 1&2 qualified, class 2A hyperbaric operators.
Efficiency
Rigorous planning, equipment pre-mobilised in 20-ft containers, rapid deployment in mainland France and overseas.
Innovation
Continuous technology watch on ROVs, multibeam sonars, marine magnetometry and LARS systems.
Quality
Quality system aligned with ISO 9001 and MASE, continuous improvement, documented customer satisfaction.
Our underwater services
Underwater UXO clearance
Survey and neutralisation of submerged ordnance (WWI/WWII legacy) in harbours, rivers and coastal zones.
Hyperbaric works & welding
Afloat hull repair, hyperbaric welding, deep-water work in class 2A surface-supplied diving rigs.
Plus: LARS, dive control, hyperbaric chamber, refloating
Beyond our three core services, SEMTEC operates a fleet of LARS (Launch & Recovery Systems), IMCA D023 dive-control cabins, a containerised hyperbaric chamber, a 20-ft HP/LP workshop and refloating capacity up to 20 tonnes.
Underwater project?
Contact our team for a tailored study — quote within 48 hours.