A Simple method for predicting the maximum squat of a high-speed displacement ship

A simple formula is developed for predicting the maximum squat of a displacement ship as it passes through the transcritical speed range. This is given in terms of a “maximum sinkage coefficient” which is almost constant across a wide range of hull forms. Satisfactory agreement is shown with model test results, and it is shown that large stern sinkages in the order of 3 – 6 metres are predicted for frigate and destroyer type hulls in shallow calm water.