Stability standards for intact vessels are based on still water data and a statistical evaluation of relevant capsize disaster counting very few "hits". The criteria are not taking into account the specific wave-going characteristics of the individual ship types. No credit is therefore given to the good sea-keeping designs compared to the penalties paid due to the-probably few-bad sea-keeping designs, which set the level for all ships. The paper deals with this problem and the new concepts which might be used as basis for future regulations to result in more rational criteria. In the field of ship structures modern methods have been developed in terms of demand and capability and the partial safety coefficients for practical use. These methods seem to lend themselves perfectly to safety against capsize. The paper deals with the too restrictive stability criteria from the theory of general systems' dynamics which not only cover the naval architecture concept of seaworthiness, but also that of seakindliness. The paper concludes that a future differentiation of criteria can always be reduced to specifications of metacentric height for the individual loading conditions of each ship and can thus be handled without extra effort by ship masters.

  • Supplemental Notes:
    • Paper presented at SNAME (Gulf Section) Spring Meeting and Star Symposium: Merchant & Naval Design, The Past in Review The Future in Forecast, Houston, April 25-28, 1979.
  • Corporate Authors:

    Society of Naval Architects and Marine Engineers

    601 Pavonia Avenue
    Jersey City, NJ  United States  07306-2907
  • Authors:
    • Kure, K
  • Publication Date: 1979

Media Info

  • Features: References;
  • Pagination: 15 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00189655
  • Record Type: Publication
  • Source Agency: Society of Naval Architects and Marine Engineers
  • Files: TRIS
  • Created Date: Apr 25 1979 12:00AM