THE STOPPING BEHAVIOUR OF LARGE TANKERS

This paper was presented at a meeting of the AGSV-MU (the Manoeuvrability section of the German "Study Group of the Ship Research Establishments") held in Berlin in Nov. 1976. The Author, of AG Weser, presents data from crash-stop and other stopping tests carried out at design and ballast draught during the sea trails of a number of 250,000-dwt turbine tankers (all with the same main dimensions), together with data from stopping tests on some 390,000-dwt tankers. These data, and those from turning-circle tests on one of the 390,000-dwt ships, are discussed, and indicate that: (i) Stopping manoeuvres are very strongly influenced by initial weather and other chance conditions, and therefore the results of a trial can hardly provide a general quantitative assessment of stopping behaviour. (ii) For large tankers at least, a stopping manoeuvre from full ahead is unsuitable for the rapid and controlled stopping of the ship. It is preferable to undertake a turning-circle manoeuvre in which the engine is not stopped until the ship has circular motion. In this way, control over the ship's movement is not lost, and, in contrast with that in the stopping manoeuvre, the direction of the course alteration is predictable. A very brief account is included of the discussion that followed the paper and which was mainly concerned with the question as to when a turning-circle manoeuvre was preferable to a conventional stopping-manoeuvre. The measured data on the tankers had shown that the turning-circle gave much the smaller advance distance; furthermore, in the conventional stopping-manoeuvre neither the lateral distance from the original course nor the ship's position is predictable, and this lateral distance can be as large as the turning circle. Order from: BSRA as No. 47,136.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0036603X
• Corporate Authors:

  Seehafen-Verlag Erik Blumenfeld

  Celsiusweg 15, Postfach 1347
  2000 Hamburg 50,   Germany 
• Authors:
  • Brende, R
• Publication Date: 1977-6

Language

• German

Media Info

• Pagination: 2 p.
• Serial:
  • Schiff und Hafen
  • Volume: 29
  • ISSN: 0036-603X

Subject/Index Terms

• TRT Terms: Braking; Maneuverability; Maneuvering; Ship pilotage; Stopping; Turning radius; Very large crude carriers
• Old TRIS Terms: Crash stop maneuver; Stopping characteristics; Turning circle calculations
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00168265
• Record Type: Publication
• Source Agency: British Ship Research Association
• Files: TRIS
• Created Date: Jan 30 1978 12:00AM