In fact, in a usual dredging cycle, self-propelled trailing suction hopper dredgers, barges and other ships spend the majority of their time sailing back and forth between extraction sites and placement sites, transporting materials between the port and the borrow site sailing between borrow sites and sailing from sites where material has been extracted to unloading or placement sites. The purpose for dredging can be maintenance of the depth or the deepening of navigation accesses or channels, it can also be land reclamation, coastal protection, seabed stabilisation for the offshore energy installations or the removal of contaminated sediments. transporting it to the relocation site and unloading the material or object. It involves collecting and bringing up, fishing up or clearing away or out material and / or any object from the bed of a river, sea, etc. Dredging means any part of the process of the removal of material from the beds of waterways transport of the material to a disposal, rehandling or treatment. Dredging is the maritime transportation of natural materials from one part of the water environment to another by specialised dredging vessels.
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