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1977-1979年,西德汉堡工业捕捞技术研究所和荷兰Зймейден捕捞科学研究所在Сардиние湖进行绳于中层拖网的实物试验和比例为1:4的模型试验。实物拖网的试验是在渔业调查船Tridens号上进行的,而拖网模型试验是在渔艇上进行的。网目周长为1,736毫米的绳于中层拖网(见图)被指定在动力功率为735-880千瓦(1,000-1,200马力)的渔船上于Гужъ水域进行作业。试验的目的是在不同装配与不同拖速的情况下测定实物拖网和模型网的性能,并把
1977-1979 In-kind testing of mid-layer trawls and modeling tests at a ratio of 1: 4 on the Сардиние lake were carried out by the Institute of Industrial Fishing Technology in West Hamburg and the Institute of Fishing Science in the Netherlands at the Зймейден Fishing Institute. The physical trawling test was carried out on the fishery survey vessel Tridens, while the trawl model test was carried out on a fishing boat. Mesh trawls with a circumference of 1,736 mm Intermediate trawls (see photo) were designated to operate in the waters of Гужъ on vessels of 735-880 kW (1,000-1,200 hp) power. The purpose of the test is to determine the physical trawl and model net performance for different assemblies and different towing speeds,