STABILITY OF SHIPS, SAFETY FROM CAPSIZE AND REMARKS ON SUBDIVISION AND FREEBOARD

In spite of recent progress in describing ship roll motion behaviour from theory and experiments, in design practice a static balancing of uprighting and upsetting moments for assessing ship stability is advocated. Roll motion dynamics can be accounted for by comparing encounter wave spectra with a probabilistic distribution of natural roll frequency. Stern quartering seas appear to be the most dangerous. Section 2 demonstrates how the effectiveness of tanker subdivision can be evaluated. An example shows the potentially great reduction in accidental oil pollution if tank sizes are limited according to the new IMCO rules for oil tankers. Furthermore, the comparative advantages of double skin and double bottom construction are shown. Section 3 gives a physical explanation for the relative increase of basic freeboard against ship length.

• Supplemental Notes:
  • Proceedings of the Second West European Conference on Marine Technology, held May, 1977, London. Cost is 28 pounds, to be paid by International Money Order.
• Corporate Authors:

  Royal Institution of Naval Architects, England

  10 Upper Belgrave Street
  London SW1X 8BQ,   England 
• Authors:
  • Abicht, W
  • Kastner, S
  • Wendel, K
• Publication Date: 1977

Subject/Index Terms

• TRT Terms: Capsizing; Marine safety; Pollution; Regulations; Safety engineering; Ship motion; Stability (Mechanics); Tanker shipping; Tankers
• Identifier Terms: International Maritime Consultative organization
• Old TRIS Terms: Double bottom tankers; Imco pollution regulations; Load lines; Roll stabilization; Ship stability; Tanker safety; Tanker subdivision
• Subject Areas: Environment; Law; Marine Transportation; Safety and Human Factors; Vehicles and Equipment;

Filing Info

• Accession Number: 00173280
• Record Type: Publication
• Source Agency: Royal Institution of Naval Architects, England
• Report/Paper Numbers: Proceeding
• Files: TRIS
• Created Date: Apr 26 1978 12:00AM