A REVIEW OF THE PREDICTION OF SQUAT IN SHALLOW-WATER

Authors
Citation
A. Millward, A REVIEW OF THE PREDICTION OF SQUAT IN SHALLOW-WATER, Journal of Navigation, 49(1), 1996, pp. 77-88
Citations number
NO
Categorie Soggetti
Oceanografhy,"Engineering, Marine
Journal title
ISSN journal
03734633
Volume
49
Issue
1
Year of publication
1996
Pages
77 - 88
Database
ISI
SICI code
0373-4633(1996)49:1<77:AROTPO>2.0.ZU;2-3
Abstract
Recent evidence has shown that the effect of a ship moving in shallow water and the resultant squat are not well understood. This paper revi ews the general problem of a ship in shallow water and illustrates the corresponding resistance, trim and sinkage at both sub-critical and a lso at super-critical speeds. The paper then reviews the various metho ds of predicting the squat of a ship in shallow water in the sub-criti cal range, which is applicable to most skips. It is suggested that the simple rule-of-thumb methods are, at best, unreliable and the paper g ives examples of empirical methods which have been tested against vari ous sets of data and seem to give more representative answers. A summa ry of the notation used is given at the end of the paper.