ENVIRONMENTAL CONDITIONS

It is recommended that more attention be paid to reviewing work on wave recording techniques and data collection in the context of sea trials and normal service voyages. The reliability of predictions was found to depend more on the validity of basic data fed into the spectra than on the precise details of spectral shape; the criterion of reliability should be based on comparison with actual service data for long-term loading distributions. For calculations involving fetch limited situations such as the design of structures for operation in the North Sea, the use of JONSWAP spectrum is advocated; it contains a fetch parameter and is already supported by a substantial amount of evidence to indicate that it is preferable on grounds of its physical validity as a model of wave conditions. The most promising possibility for accumulating reliable measured data on a global climatological scale is offered by satellite-based system. A reference to a recent American publication giving extensive information on tropical cyclones for all six relevant ocean basins and a list of climatological summaries published by Member Countries of the World Meteorological Organization is given. Abnormal waves in certain areas where there are special local factors such as refraction due to currents or shoaling are mentioned. The dangers of ice accretion and ways of avoiding them with regard to both design and operational implications are also discussed, as well as the reviews of data and information sources on icing climatology. The enormous cost of damage and loss of performance due to both fouling and corrosion and the interaction of the two effects is emphasized. Some striking successes in protective coating development have, however, been achieved.

  • Supplemental Notes:
    • Report of Committee I.1, August 23-26, 1976.
  • Corporate Authors:

    International Ship Structures Congress (Sixth)

    Boston, MA  United States 
  • Publication Date: 1976

Media Info

  • Features: References;
  • Pagination: 77 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00157145
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Aug 4 1977 12:00AM