Question: how does a trailing suction hopper dredger work

title: Trailing suction hopper dredger
text: Dumping - This is done by simply opening the doors that close the hopper . Once opened the substance will simply drop to the seabed because of gravity . The hopper will never be completely empty because there will always be some residue and water left inside . Pressing - High pressure pumps will pump water inside the hopper to loosen or even liquefy the substance , which can then be pumped via long hoses over great distances ( f.i. ashore ) Rainbowing - This is the same principle as pressing , but instead of transporting the substance it will simply be blown away . This is often used to create land . Crane - It is always possible to discharge the load with a crane , but this will be a time consuming process .