Target species captured with this type of net are demersal fishes (hake, blue whiting and whiting). By design, the nets are made from four panels with three bridles, permitting vertical heights of up to 50 metres. A net can be as much as 250 metres long. The mesh size in the forepart of the wings can reach a maximum of 3.2 metres in order to reduce drift. Under those circumstances, the towing speed is usually slow (2 to 2.5 knots), which contributes to reducing gas-oil consumption considerably.