A method is presented for determining the service speed of an operating ship. The method is explained for the case of tankers of various sizes operating between the Persian Gulf and Japan, and is based on data on fouling, aging, currents, and wind (all taken from the ships' logs) together with the wave spectrum as predicted from actual loss of speed and theoretical added wave-resistance. The various elements affecting service speed are calculated and taken into account to determine the service speed for the particular ship and voyage concerned. The article includes a block diagram showing the steps in this procedure. Service speed as presumed by this method has been compared with actual data, and this has shown that the method is effective. Order from BSRA as No. 53,485.

  • Availability:
  • Corporate Authors:

    Society of Naval Architects of Japan

    23 Shiba-kotohiracho, Minato-ku
    Tokyo 135,   Japan 
  • Authors:
    • Yamazaki, Y
  • Publication Date: 1979-12


  • Japanese

Media Info

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Filing Info

  • Accession Number: 00317473
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Oct 8 1980 12:00AM