Trailing suction hopper dredgers
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.

Rainbowing
Rainbowing

Rainbowing is a method by which trailing suction hopper dredgers place material in shallow areas by pumping into the air through a hose with a nozzle.

“Facts About Trailing Suction Hopper Dredgers” describes self-propelled hydraulic dredgers with drag heads that suction up loose materials like sand.
Trailing Suction Hopper Dredgers

“Facts About Trailing Suction Hopper Dredgers” describes self-propelled hydraulic dredgers with drag heads that suction up loose materials like sand.