Hoses connected to a pipeline extending to shore are attached to the hopper dredge discharge manifold. The dredge then moors to a structure, buoy, or multiple buoy berth. A hopper dredge fills its hoppers as it dredges the bottom. Direct pumpout is a common method of removing dredged material from hopper dredges. During this time, the dredge may move much faster and may turn frequently. When the dredge's hopper is loaded, the dredge maneuvers both in and out of the channel to reach the relocation site. These signals also indicate that the dredge is restricted in its ability to maneuver and you must stay clear of the vessel. At night, a red light over a white light over another red light means the dredge is working. During the day, a black ball over a black diamond over another black ball will be shown. Normally, you can tell when they are dredging by the signals on the main mast. ![]() Hopper dredges perform the largest and most dangerous jobs - clearing channels and offshore sandbars from the mouths of major rivers. A Hopper dredge is a propelled floating plant which is capable of dredging material, storing it onboard, transporting it to the disposal area, and dumping it.
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