MEASUREMENT OF DRAUGHT VARIATIONS OF SHIPS IN PORT APPROACHES 1976

A full-scale study of the behaviour of ships in shallow water has been carried out in the Humber estuary. The study which was performed by the Department of Naval Architecture and Shipbuilding of the University of Newcastle-upon-Tyne on behalf of the National Ports Council, had the following main objectives: i) To investigate the feasibility of using long range photogrammetric methods to measure changes in attitudes of ships operating in port approaches. ii) To measure draught and trim changes of ships under way in a port approach. iii) To consider the possibility of calibrating port approaches so that their effects on ships using them might be predicted. The Report compares observatory techniques considered for the project and gives the reasons for the choice of a photogrammetric method. The errors and corrections associated with the method are identified and the results of full-scale measurements are summarised and discussed. The method proved to be generally acceptable and the first two objectives were achieved. The third objective, the calibration of the port approaches was not realised however, because insufficient data was collected. Some doubt exists as to the practicality of ever making such a calibration. Details of the photographic analysis procedure and spectral analysis of ship motions are given in Appendices. Order from BSRA as No. 52,716.

  • Corporate Authors:

    National Ports Council

    Commonwealth House, 1-19 New Oxford Street
    London WC1A 1DZ,   England 
  • Publication Date: 1976-4

Media Info

  • Pagination: 43 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00315001
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Aug 27 1980 12:00AM