A selection of marine contracting operations carried out for port authorities, industrial clients and infrastructure owners, from subsea inspections to full port maintenance campaigns.
Click any card to open the full case study: context, scope, operations performed, challenges and key outcomes.
Madagascar
Subsea
Replacement of a 300 m / 330-tonne cold-water intake pipe section serving an industrial processing plant in Madagascar, cut, lift and reconnect under heavy swell, using a light-resource method engineered in-house.
La Réunion
Decommissioning
Dismantling and recovery of the storm-damaged CETO wave-energy prototype (>600 t) off Pierrefond at -20 m, including the securing of pressurized hydraulic components, for DCNS / EDF EN.
La Réunion
Inspection
Recurring underwater inspection of the EDF Takamaka 2 hydroelectric dam, bottom control, cofferdam checks, sluice and gallery surveys, with altitude-diving equivalent-depth management.
La Réunion
Civil works
Underwater reinforcement of an abutment of the Rivière des Marsouins bridge in Saint-Benoît, earthworks, retaining walls and 700 m³ of colloidal concrete under a strict anti-pollution framework.
Madagascar
Port
Long-running framework at the deepwater Port of Ehoala (Fort Dauphin / Rio Tinto), underwater infrastructure maintenance, dredging, aids-to-navigation buoys and recurring bathymetric monitoring since 2011.
Madagascar
Port
EPCM maintenance programme at the Port of Tamatave, structural assessment of moles B & C, 4,000 m³ dredging, two 1,250 m pipelines and underwater concrete repairs on Mole C.
Featured
When a failure on a cold-water pipe threatened to shut down an industrial processing plant in Madagascar, Seanergy mobilized a multi-disciplinary team within 36 hours. Diagnostic, clamp engineering, mixed-gas diving and full recommissioning were delivered on schedule, under third-party oversight.
A snapshot of operations delivered across the Indian Ocean, Africa and beyond, organised by region.
