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Trailing Suction Hopper Dredgers: How does it work?

Trailing suction hopper dredgers can fill their own holds (hoppers) by sucking material from the seabed using a trailing suction head fitted to pipes that trail over the bed as the ship sails.

Trailing suction hopper dredgers can operate independently of other equipment and are able to transport the dredged material over long distances. The material can then be deposited through hatches in the bottom of the ship or by rainbowing. It can also be pumped ashore through a pipeline for land reclamation.