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Deck TypeDecked vesselsOverviewThese vessels use a dredge for collecting molluscs from the bottom. The vessel drags the gear over the seabed digging the shellfish from the ground. The dredges are towed in a manner similar to beam trawlers. Large dredgers may work three or more dredges on each side. On other type of dredgers, heavy mechanical dredging units are operated by special gallows from the bow of the vessel.Vessel ClassLengthall  (LOA) PowerallTonnageall  (GRT in register tons) Deck ArrangementDredgers do not have a typical deck arrangement; bridge and accommodation can be placed aft or forward.Catch Handling and Processing EquipmentAll.EquipmentDeck EquipmentIf the dredger is employing a hydraulic dredge then a powerful water pump is necessary to operate the water jets on the dredge to flush the molluscs from the bottom. Derricks and winches may be installed for lowering and lifting of the dredge.Fish Detection EquipmentTypical detection equipment of dredgers consists of an echosounder for estimation of water depth and navigation devices.Fishing Gear Dredges.
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