Model Experiments on Trawl Nets of Various Types Masatsune NOMURA and Tatsuo YASUI To obtain relationship between the resistance and towing speed of trawl-nets and to observe the deformation of the nets under towing, tank experiments were carried out on the following five typesof trawl-nets:-1) Ordinary otter trawl, 2) Danish seine which is commanly used in the northeastern area of Japanese waters, 3) Two-boats type trawl generally operated in the East ChinaSea by Japanese fishermen, 4) Japanese type small sized trawl operated by Dist. of spreaders 23 m Dist. of spreaders 36 m Danish sein Dist. of spreaders 24 m Dist. of spreaders 39 m Side view of the nets (photo. by authors) Two-boat type trawl Dist. of spreaders 27 m Dist. of spreaders 41 m Japanese type hand operated small trawl Dist. of spreaders 13 m
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