The Authors present and discuss the results of a number of manoeuvring tests, both full-scale and model, on three 360,000-dwt sister tankers; the data were obtained for the study of scale effects in ship manoeuvrability. In the sea trials, a new measuring system, "Triposik", was used; it consists of a main station in the ship transmitting UHF signals, and two slave stations ashore, and is described as ideal for measuring the ship's speed and position (see also MRIS abstract No. 21-170073). Course-keeping qualities were found to be almost the same for both model and ship. Measurements of drift angle, speed-drop ratio, advance, and transfer in steady turns are among the matters discussed. A method was evolved for simulating propeller-reversing stopping ability. A pair of differential equations for this purpose is presented, and by solving these the path and speed after the propeller is reversed can be accurately simulated. Other factors such as head reach, lateral reach, stopping time, and heading angle at zero speed of advance also coincided well with observed data. This method was found to be useful for these particular ships, and could be applied to any ship with a conventional propelling system. Order from BSRA as No. 52,618.

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  • Corporate Authors:

    Kansai Zosen Kyokai, Osaka University

    Aza-yamadaue, Suitashi
    Osaka,   Japan 
  • Authors:
    • Tajima, K
    • Kuroyanagi, Y
  • Publication Date: 1978-6


  • Japanese

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Filing Info

  • Accession Number: 00314984
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Aug 27 1980 12:00AM