2. Drift Bottom Gill Net This gear is used to catch demersal fish or swimming crab. Depending on the target species, the net has different specifications that include mesh size, yam size, hanging ratio and the length and height of the net.
This type is the most commonly used for catching bottom fishes such as grouper, croaker, bream etc., with a mesh size of 48 - 400 mm, the yam size of 0. 17 - 0.70 mm diameters, the head rope length is up to 7000 m and the height is up to 5m.
The bottom gill net is used in two fishing methods: where the net is drifted close to the bottom; or the net is set fixed with two anchors at the ends.
According to the target species, the bottom gill net can be operated during both day and night.
Net Setting:
In the fishing grounds with a flat bottom, the net is set across the current. By this method, because of the current, the net is set drifting freely on the bottom. During the setting operation, which is done at the vessel side, the vessel runs with a speed of 1 -2 kts . The bottom gill net is also set to be stationary around reefs because of the two anchors.
Net Hauling:
The vessel runs to the flag buoy and the hauling operation is carried out at the vessel's a speed of 1.5 - 2.5 kts according to the wave conditions and the quantity of fish caught in the net.
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