围网网具的沉降性能包括网具的最大沉降深度和下纲沉降速度两方面内容。目前,我国围网的作业渔场已逐渐由近海向外海发展,随着作业水深的递增,围网网具的沉降性能在渔业生产上的实用价值越来越大。围网网具的最大沉降深度与有效捕捞深度紧密相关;围网下纲的迅速沉降,能防止鱼群从下纲逃逸。 The settlement of the seine net includes the maximum depth of settlement of the net and the settlement speed of the next suture. At present, the operating fishing grounds of China’s seine network have gradually developed from the offshore to the open sea. With the increasing of the working depth, the practical value of the sewerage of the fencing net in the fishery production is increasing. The maximum settlement depth of the seine net is closely related to the effective fishing depth; the rapid subsidence of the seine net can prevent the fish from escaping from the lower segment.