MANOEUVRING IN SHALLOW WATER: HYDRODYNAMIC ASPECTS--RESEARCH RESULTS

The Author discusses problems involving environmental forces and ship behaviour during manoeuvres in shallow water, together with some relevant research results from various sources. Among the aspects considered are:--current-induced drag forces; wave-induced forces and movements; ship inertia and its sensitivity to changes in water depth; effects of shallow water on manoeuvrability of large ships (some results from tests by the I.R.C.N on the 213,000-dwt Shell tanker Magdala are used to demonstrate these effects); heading stability; resistance, power, thrust, ship speed, rpm, and propulsive efficiency; stopping distance; squat and sinkage, including effects of initial trim, speed-induced sinkage, and wave-induced sinkage. A general conclusion drawn is that it is still not possible to give a clear answer to all the questions raised concerning shallow-water effects. Speed-induced sinkage can be calculated with some accuracy, but wave effects need further study. The results of hydrodynamic studies on shallow-water effects on manoeuvrability remain qualitative, and are far from complete; in this field in particular, the results should be confirmed and clarified by the seaman's experience. Order from BSRA as No. 52,162.

  • Supplemental Notes:
    • Proceedings of the First International Symposium on Ship Approach and Berthing Manoeuvres, Grenoble, Sept. 1977.
  • Corporate Authors:

    Intl Symp on Ship Approach & Berthing Manoeuvres

    Grenoble,   France 
  • Authors:
    • Sommet, J
  • Publication Date: 1977

Media Info

  • Pagination: 10 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00308993
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Report/Paper Numbers: Conf Paper
  • Files: TRIS
  • Created Date: Mar 31 1980 12:00AM