A Preliminary Design Method for the Prediction of Squat in Shallow Water

Abstract

The variation of squat with speed in shallow water has been shown to be important with the sinking of the ferry Herald of Free Enterprise, yet it is not easily predictable, particularly at higher speeds. The squat characteristics of a number of ship models have been analyzed and an empirical method of predicting the squat at subcritical speeds has been devised. This method has been compared with data from the model tests of the Herald of Free Enterprise and has shown good agreement.