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近年来渔业劳动力的缺少和渔民平均年令增加的情况有所发展。由于沿岸地区的工业化这种必然趋向,结果,促进了各种渔法、渔船的机械化和合理化的研究。这些年来,探鱼仪的性能已有很大的改进。一些拖网渔船现在装置有可提供不同类型的数据的遥测仪器。现代的拖网渔船上已实现了可变螺距推进器,主机和电动或液压拖网绞车的遥控,但是作业工具与渔具仍需由熟练渔工来操纵。各种自动控制的渔法尝试将测量仪器(即探鱼仪、声纳、雷达、电罗经、网高仪、测探仪、张力计、计程仪等等)及可变螺距推
In recent years, there has been some development in the shortage of fisheries and the increase in the average annual number of fishermen. As a result of the inevitable trend of industrialization in the coastal areas, the results have promoted the mechanization and rationalization of various fishing and fishing vessels. The performance of fish finders has been greatly improved over the years. Some trawlers now have telemetry devices that provide different types of data. Modern variable-pitch thrusters, mainframes and remote controls for electric or hydraulic trawling winches have been implemented on modern trawlers, but work tools and gear still need to be handled by skilled fishermen. A variety of automatic control fishing methods try measuring instruments (ie fish finder, sonar, radar, gyrocompass, netting, detector, tension meter, the odometer, etc.) and variable pitch push