Underwater mining

rock concretion on the sea bottom made of layers of iron/manganese hydroxides

mineral extraction from the ocean floor

Canadian deep sea mining exploration company

Diamond-mining ship built in 1983

hydrocarbons

Dredging, Environmental and Marine Engineering NV (DEME) is an international group of specialised companies in the fields of capital and maintenance dredging, land reclamation, port infrastructure development, offshore related services for the oil & gas industry, offshore windfarm installation, and environmental remediation. The group is based in Zwijndrecht, Belgium, and has current operations on five continents.