After an introduction in which, inter alia, it is pointed out that new problems in ship stability have accompanied the introduction of new types of vessels in recent years, while there has also been considerable (though not yet sufficient) progress in our knowledge of the factors affecting it, the Author reviews, with frequent references to the literature, the criteria that appear from recent studies to be most appropriate for effecting stability improvements. The paper is presented under the main headings;--A Look at the Past; The Safety Concept; Factors relating to the Distribution and Arrangement of the Cargo or to the Type of Employment of the Ship; Stability Criteria for Tug; Factors relating to Ambient Navigational Conditions; Stability of the Ship under the Action of Wind and in Beam Seas; Water Shipped on Deck; Effects of a Following Sea on Stability. In a concluding section of the paper, the Author discusses some relevant activities of IMCO and its study groups, and also mentions that, although present concepts relating to stability are much more rational and clear than those of 25 years ago, there are still gaps in our knowledge. Most studies up to now have dealt only with avoidance of capsizing through well-defined causes; there is a need to investigate the basic characteristics of stability in order to obtain a deeper insight of the relationships between ship/seaway system variables and ship stability. In many cases, particularly in small ships, the master cannot make an accurate check on stability; some means of solving this specific problem are suggested. Order from BSRA as No. 49,786.

  • Supplemental Notes:
    • This paper was presented at the Congreso Iberoamericano de Ingenieria Naval, held in Madrid and Seville in May 1978.
  • Corporate Authors:

    Asociacion de Ingenieros Navales

    Apdo Correos 457
    Madrid,   Spain 
  • Authors:
    • Molina, F Z
  • Publication Date: 1978-8


  • Spanish

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Filing Info

  • Accession Number: 00189264
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Mar 28 1979 12:00AM