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An otter board Front of the otter board Folded otter board. The otter is a fishing device constructed with two parts, an otter board and a fishing line. It is steered by pulling on the line then letting stack so the slide mechanism on the board operates to switch direction. It may be used from a boat or pulled from the shore.
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Otter boards are positioned in such a way that the hydrodynamic forces acting on them when the net is towed along the seabed push the boards outwards to keep the mouth of the net open. The nets were attached to heavy duty ground ropes, 40 feet (12 m) long, which held the nets on the seabed and ticked up any fish lying on or below the sand.
Some otter trawlers are also outrigger trawlers (above), using outriggers to tow one or two otter trawls from each side. [22] Usually otter trawlers have the superstructure forward, though it can be aft or amidship. Gallows are on the stern quarters or there is a stern gantry for operating the otter boards.
Otter trawling derives its name from the large rectangular otter boards which are used to keep the mouth of the trawl net open. Otter boards are made of timber or steel and are positioned in such a way that the hydrodynamic forces, acting on them when the net is towed along the seabed, push them outwards and prevent the mouth of the net from ...
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List of free analog and digital electronic circuit simulators, available for Windows, macOS, Linux, and comparing against UC Berkeley SPICE.The following table is split into two groups based on whether it has a graphical visual interface or not.
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