Deep-sea mining involves the extraction of valuable minerals from the ocean or sea floor with the help of sophisticated ships custom-built for this purpose.
The mining vessels have specialised equipment and onboard systems, even ROVs, for mining or drilling underwater, mapping the sea bed, collecting samples and gathering data.
Some mining vessels extract diamonds off the coast of South Africa, while others look for copper, silver, gold, etc., which are used in making batteries for electric...
https://www.marineinsight.com/types-of-ships/mining-ships-in-the-world/