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2. 2) Hu Fuxiang and K. Matuda: Estimation of the drag of midwater trawl net. J. Tokyo Univ. Fish., 78, 19-25 (1991) (in Japanese).
3. 3) K. Matuda, Hu Fuxinag, and S. Ishizawa: Hydrodynamic characteristics of vertical V type otter board. Nippon Suisan Gakkaishi, 56, 1927-1934 (1991) (in Japanese).
4. 4) J. S. Walton and H. Polachek: Calculation of transient motions of submerged cables. Math. Comput., 14, 27-46 (1960).
5. 5) Hu Fuxiang: Studies on the Control Characteristics of Midwater Trawl System Ph. D. thesis, Tokyo University of Fisheries, Tokyo 1993, 194 p. (in Japanese).