There are many types of drift gill net used for different target species. Generally, their construction is a wall of net that is set across the water current and be allowed to drift according to the current direction.The head rope or float line is on the surface of the water or mid water hang by float. The lower part of the net is without sinker or with a sinker line depending on the target species and the characteristics of the fishing ground of river. Fishing with drift gill net is commonly carried out by flood tide and ebb tide. Kept on the surface or a certain distance below it, by numerous floats, these net drift freely with the current, separately or more often with the boat to which they are attached.

     The length of the drift gill net depends on the size of boat, financial ability of fishermen. The average length of the gill net is from 25 m to 360 m and the height of the nets also depends on the target species and ranges from 2 m to 7 m. The mesh size used for drift gill nets are from 18 to 150 mm. The material for making the net is nylon multifilament of PA210D/6 to PA210D/30 and nylon monofilament of 0.25mm to 0.5mm diameter.