<Ul> <Li> 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 . </Li> <Li> 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) </Li> <Li> 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 . </Li> <Li> Crane - It is always possible to discharge the load with a crane, but this will be a time consuming process . </Li> </Ul> <Li> 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 . </Li> <Li> 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) </Li> <Li> 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 . </Li>

How does a trailing suction hopper dredger work