Handling of a VLCC by Two Tugs in Shallow Water

Abstract

The mathematical model of ship handling in confined waters has been extended to include the effect of two tractor-type tugs. This extended mathematical model was employed to investigate different towing arrangements of a 150,000 dwt tanker in shallow water at different wind speeds and directions in both full load and ballast conditions. Two towing arrangements were considered and a parametric study was carried out to calculate the maximum value of the towing vector diagram.