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American seiner
American seiner
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Deck TypeDecked vesselsOverviewAmerican seiners are most common on both coasts of North America and in many areas of Oceana and like all purse seiners are a most effective vessels for catching aggregating species near the surface. The vessel surrounds the shoal with a deep curtain of netting and than the bottom of the net is pursed (closed) underneath the shoal by hauling a wire which runs from the vessel through rings on the bottom of the net and back to the vessel. Searching for shoals and assessing the size and direction of movement of it are the most important part of the fishing operation. To assist in fish detection crows nests are sometimes arranged on masts and on large vessels observation towers and helicopter landing decks are provided. For improved manoeuvrability during fishing operations the vessels may be equipped with bow thrusters.Vessel ClassLengthnormally > 25 meters  (LOA) Powernormally > 350 HpTonnagenormally > 50 GT  (GRT in register tons) Deck ArrangementThese seiners have the bridge and accommodation placed forward with the working deck aft.Catch Handling and Processing EquipmentAll.EquipmentDeck EquipmentThe power block is normally attached to a boom from a mast located directly behind the superstructure. A purse line winch will be located near the hauling station, usually on a preferred side amidships, where the rings are taken onboard. The net is stowed and carried at the stern of the vessel from which position the setting will take place.Fish Detection EquipmentAdvanced electronic equipment such as different types of echosounders, sonar, and track plotters are used to: support the search for schools; assess the size and movement of the school; and to keep in touch with the school whilst surrounding it with the seine. Helicopters and spotter planes may also be employed for detecting fish schools.Fishing Gear Purse seines.
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