Apparatus for assembling a liner

Apparatus for conveying and separating loose material

Apparatus for recovering minerals, in particular manganese nodul

Apparatus for recovering particulate material from the sea botto

Apparatus for recovery of sulfur

Apparatus for underwater retrieval, selection and concentration

Attachment flange for flexible conduit

Auriferous gravel interceptor

Deep sea mining apparatus

Device for collecting manganese nodules on the ocean floor

Device for separating phases for rigid multiphase materials

Dragline equipped with hopper means and loading means

Dredge head with mechanical and pumping action

Dredging apparatus

Dredging apparatus including suction nozzles

Equipment for extracting ores from sea beds

Extraction of organic matter from marine sediment

Floating grab dredge and unloading method therefor

Foam process for recovering underground rock fragments

Golf ball dredge