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Deck TypeNormally decked vessels but may, in small scale fisheries include large undecked canoes.OverviewDepending on the area of operation and trawl used, trawlers range in size from open boats, undecked, powered by outboard engines up to large freezer trawlers and factory trawlers which can fish in the most distant waters. Trawling is the most important and one of the most efficient fishing methods in the world. Today, commercial trawling is carried out from very shallow waters up to a depth of 2000 m. These deep water vessels are provided with engines of sufficient power to tow the gear at the appropriate trawling speed.Vessel ClassLengthall  (LOA) PowerallTonnageall  (GRT in register tons) Additional informationThis parent classification includes all vessels operating in an active manner involving towing one or more nets classified as trawls.Deck ArrangementFrom the point of view of deck arrangement three main types of trawlers can be distinguished: the side trawler (Fig. 1), the Stern trawlers (Fig. 2) and the Outrigger trawlers (Fig. 3).Catch Handling and Processing EquipmentFresh fish in ice or refrigerated sea water and/or frozen fish in blocks or boxes.EquipmentDeck EquipmentThere will be various arrangements of the deck equipment depending on the type of trawler concerned. All trawlers will carry a trawl winches for handling and storage of the towing warps. Gilson winches, net drums and other auxiliary winches are commonly installed to handle the gear and the catch. Pelagic trawlers may be equipped with fish pumps for emptying the codend.Fish Detection EquipmentTypical fish detection equipment of trawlers consists usually of a sonar, net sounder, various types of echosounders and trawl control equipment.Fishing Gear Bottom trawls , .
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