Although a ship's turning characteristics have been thoroughly investigated when she goes ahead, there are some aspects left unclear when she goes astern. For example, there are two inconsistent opinions of the position of the pivot point in astern turning. Some workers say that the pivot point will be at the fore part of the ship if hydrodynamic derivatives of the hull are identical with those of the usual ahead going case, and others say that the point is at the after part of the ship. Practically this becomes quite a problem when a master or a pilot has the ship pushed or pulled laterally by tugs. The author has studied these characteristics by experiments using models and actual ships. After obtaining the experimental data, he calculates astern turning characteristics.

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  • Supplemental Notes:
    • Paper presented at the International Congress of the Institutes of Navigation held at the University of Sussex, England, from 10 to 14 September. The Congress was sponsored by the Institutes of Navigation in Australia, France, the Federal Republic of Germany, Italy, Japan, the United Kingdom and the United States of America.
  • Corporate Authors:

    Royal Institute of Navigation

    Royal Geographical Society, 1 Kensington Gore
    London SW7,   England 

    Royal Institute of Navigation

    1 Kensington Gore
    London,   England 
  • Authors:
    • Kugumiya, H
  • Publication Date: 1979-9

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Filing Info

  • Accession Number: 00303235
  • Record Type: Publication
  • Report/Paper Numbers: Conf Paper
  • Files: TRIS
  • Created Date: Jan 15 1980 12:00AM