Photo: David Linkie, Fishing News
Scottish Seine Netting (flydragging) uses long lengths of seine rope to herd fish into the path of the net as the gear is hauled. Up to 3 kilometres of rope may be put out in a triangular configuration (see picture) with the dhan, or marker buoy, supporting the end of rope first shot. The vessel returns to this to complete the shoot. Both ropes are then led to the winch and the vessel steams slowly ahead at around 1 knot, gradually increasing winch speed as the gear closes to keep the net moving steadily forward.
Floats keep the net open vertically and this is attached to the footrope using a combination sweep of rope and wire. The footrope is generally rigged much lighter than that of a trawl, but is sufficiently weighted lead weights keep close to the bottom floats keep it open. to keep the lower edge of the net mouth in contact with the sea bed. A seine net may reach a forward speed of 2 knots during the later stages of the haul, before it leaves the bottom. Most whitefish species can be taken by this method, which is mostly used on the continental shelf up to a maximum depth of 200 metres.
Seine net vessels range from 12-30m and in the past were fitted with much lower powered engines than trawlers of comparable size, as they use lighter gear. New vessels are generally built as dual purpose seiners/trawlers and have shelterdecks under which the long rope warps are stored on rope reels. An articulated power block is used to haul both sweeps and net.
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