![]() Steel cables are used to move the ladder or cutter head back and forth, with the spud in the spud carriage as the center of each concentric circle that it describes. One spud pole (the auxiliary spud) passes straight through the vessel, while the other is mounted on a movable spud carriage, which can be moved lengthwise along the vessel or pontoon. ![]() On the aft side, the cutter generally has two spud poles. The ladder with cutter head is positioned at the fore of the vessel. The suction tube and cutter head are attached to a ladder. The vacuum force at the suction inlet sucks up the loosened material. A suction inlet located beneath the cutter head (known as the suction mouth) is connected by a suction tube directly to one or more centrifugal pumps. ![]() A cutter suction dredger is a stationary or self-propelled vessel that uses a rotating cutter head to loosen the material in the bed (‘cutting’).
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