THE MANOEUVRING OF SHIPS

The paper is presented in two parts. The first part reviews conventional methods for evaluating the manoeuvring characteristics of ships during sea trials, i.e. (1) Dieudonne spiral; (2) pull-out test; (3) weave manoeuvre; (4) turning circle; (5) entry into turning circle; (6) Kempf zig-zag manoeuvre; and (7) normal and emergency (crash-stop) stopping manoeuvres. These tests which have been developed for trials in deep water and at maximum speed are discussed with reference to the example of a 240,000-dwt tanker, loaded and in ballast. Data is presented graphically. It is pointed out that the analytical criteria of Gertler and Gover for assessing manoeuvrability no longer apply for ships whose length exceeds 500 feet. A number of more recent criteria are presented and briefly discussed. The second part of the paper is devoted to the problems of manoeuvring in a harbour area. In this case, it is necessary to consider the ship and the location as an entirety, i.e. ship + site. In any consideration of manoeuvrability test methods it is necessary to take account of the human factor, which, when introduced into the equation "ship + site + human factor" gives a measure of the "docility" or controllability of the ship. The paper concludes with a review of methods for analysing the zig-zag manoeuvre. Order from BSRA as No. 49,606.

  • Supplemental Notes:
    • Nouveautes Techniques Maritimes 1977.
  • Corporate Authors:

    Journal de la Marine Marchande

    190 Boulevard Haussmann
    75008 Paris,   France 
  • Authors:
    • Nizery, B
  • Publication Date: 1977

Language

  • French

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00195381
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Jul 31 1979 12:00AM