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2. 2) P R. Crew: Some of the general engineering principals of trawl gear design, in “Modern Fishing Gear ofthe World II Fishing News (books) Ltd., London, 1964, pp. 165-180.
3. 3) R. N. Patterson and K. C. Watts: The Otter bond as a lowaspect-ratio wing at high angles of attack; an experimental study, Fisheries Research 14, 111-130 (1986).
4. 4) J. Rin, O. Sato, K. Nashimoto and K. Yanamoto: Hydrodynamic characteristics of lift and drag of saucershaped otter boards for different cambers, Nippon Suisan Gakkaishi, 54, 779-786 (1988).
5. 5) K. Matuda, H. Fuxiang and S. Ishizuka: Hydrodynamic characteristics of wing parakite, a net-mourth opening device made of canvas, Nippon Suisan Gakkaishi, 55, 1927-1934 (1989)